Good catch! The wording is super important as it can mean different things.

I got this one right as well. The argument is vulnerable because the premise states life can only evolve in the presence of water. The argument fails to consider the possibilities of other things that can evolve life.

I got this one right! For anyone who may have had difficulty with this one, really pay attention to your premise and conclusion in this. Just because one that has bulging or ruptured disc did not have any serious back pain when normally these conditions causes it, does not mean others won't experience serious back pain as a result of having a bulging or ruptured disc, meaning others can experience severe back pain as a result of bulging or ruptured disc. (Which gives us answer choice B)

Have to be careful with these ones. Answer choices will try to trap you with premises. I think I messed up on this a lot before. I try to make sure I have the right conclusion pointed out first.