Can anyone explain exactly why D is the answer. I kind of get it, but just need a brief reason why it is most definitely the answer as opposed to any of the others. Like what makes it stand out the most?

#help why is the answer A and not E?

Why is the answer B and not C?

I selected E. I thought the people's confidence was important. If the other scientists knew that the people's confidence in professor smith was low, they didn't have to worry about needing to discredit it because no one would believe him. Please help me understand why this is not the correct choice and why C (present evidence to find truth) is.

Why is the main point (D) "research effort" and not (A) it is probably technologically possible to alter the climate?

How is D the answer? Why could genetics not be a possible way to determine schizophrenia in the future? - I selected C, but now see why that wasn't right, but not why D is the correct AC... #Help

How is "homelessness as a social problem" compatible to accepting/denying the conclusion?

I understand why the answer was D, but need a good reason to keep me from picking an answer like A. in the future....I was going back and forth between A and D and selected A last minute.