Engineer:  Some people argue that the world's energy problems could be solved by mining the Moon for helium–3, which ...

Okay, so after reading the other messages on this board, I understand why D is the correct choice. I narrowed it down to A and D before answering and, ultimately, chose A. The reason I chose A was because I thought that D seemed too extreme, which, if included in an answer choice, I stray away from. I do get how this is the right answer, but I am concerned about questions that might be similar to this one and repeat my mistakes. Therefore, the question I have stems from an observation: in the conclusion (or at least part of it I think), the author says "But this is nonsense". Since the author uses such extreme vocabulary, is it safe to assume that your answer choice could also have extreme vocabulary as well? I understand it would be applicable for a statement as simple as "it must have all of these requirements" and an answer choice including that vocabulary. However, I mean more of vocab that is similar to "nonsense". Is it always safe to assume that if the author has an extreme opinion that the answer choice that includes that is a safe bet? If not, is there another way to attack these types of questions?