Summary
The more individual members of a species we study, the better we understand that species. The better we understand the behavior and ecological niche of an endangered species, the better our chance is of saving that species.
Strongly Supported Conclusions
Therefore, as a species becomes more endangered, the more difficult it is to acquire the understanding to save that species.
A
many endangered species will become extinct before we have the knowledge that is necessary to save them
We don’t know whether many endangered species will in fact become extinct. We only know that our chance of saving an endangered species increases if we better understand that species.
B
continued reduction of wildlife habitat will make the preservation of many endangered species impossible
We don’t know whether it’s impossible to save some endangered species if their habitats continue to be reduced. The stimulus does not address the reduction of wildlife habitats.
C
knowledge that contributes to saving endangered species becomes harder to get as species become more endangered
If the number of individual members of a species causally contributes to our understanding of that species, which in turn causally contributes to our chance of saving that species, it must be that the fewer the individuals left to study, the less our chance is of saving that species.
D
to save endangered species it is more important to acquire the right kind of knowledge than to take action
We don’t know whether acquiring knowledge is more important than taking action in order to save an endangered species. We only know that our chances of saving an endangered species increases as our understanding of that species increases.
E
the impact of human study of endangered species is sometimes more harmful than beneficial
We don’t know whether human study of endangered species is sometimes harmful.
Summary
A theory surrounding the importance of vitamin C contends that it plays a crucial role in producing the body’s supply of collagen, a protein that is almost exclusively present in connective tissue and bone. Because of this, some doctors believe that vitamin C can be useful for treating symptoms of some common illnesses.
Strongly Supported Conclusions
Some common illnesses (or their symptoms) are caused by a lack of collagen in the body.
Some common illnesses impact the health of one’s connective tissue and bones.
Some common illnesses impact the health of one’s connective tissue and bones.
A
Some doctors believe that there are illnesses that affect the state of connective tissue or bones.
The stimulus says, “for this reason” (vitamin C plays a crucial role in producing collagen) some doctors think it can be useful to treat symptoms. It is reasonable to assume that these illnesses impact connective tissue and bone, where collagen is almost exclusively present.
B
Some doctors believe that vitamin C is the only substance that produces and maintains collagen.
There is no support to suggest that vitamin C exclusively produces collagen. The stimulus only specifies that collagen *almost* exclusively occurs in the body’s connective tissue and bones. But there is no link to vitamin C being the sole provider of it.
C
Some doctors believe that strengthening connective tissue and bones increases the body’s ability to use certain vitamins.
This has the logic flipped. It's reasonable to assume that some doctors believe vitamin C strengthens bones and connective tissue (not the other way around).
D
Some doctors believe that use of vitamin C is the most effective treatment for certain common illnesses.
This is too strong to support. The stimulus specifies that some doctors recommend vitamin C to treat some illnesses. But there is no evidence that it is the *most* effective treatment.
E
Some doctors believe that any illness that can be ameliorated with vitamin C causes deterioration of connective tissue and bones.
This is too strong to support and not very well supported. The stimulus only says that *some* (not any) illnesses can be helped by vitamin C. It is also a bit of an assumption to suggest that these illnesses cause deterioration in the bone.