Wording

@jacaroe this is a great question. You have clearly realized the importance of attention to detail and not getting fooled by the LSAC. The best way to practice is to continue to expose yourself real LSAT questions. I realize that this response is not particularly helpful since it is simply stating the obvious but the more you practice, the more you will get accustomed to the ways LSAC will try to trick and/or confuse you. Hope that helps! Please let us know if you have any other questions.

Is there any way to have turned this question into sufficient and necessary diagrams to help understand what the question is trying to get at?

The question is asking us for the main conclusion/main point. While we could diagram this out, that's not really going to help us since we're not trying to find a missing premise or assumption. Keeping our eyes peeled for keywords that suggest conclusions is very helpful. In looking at the stimulus, we see the phrase "it is clear that," which is a strong conclusion indicator. The statement that comes after this phrase reveals the author's attitude, and the rest of the stimulus is used to support the author's attitude here, so the statement after "it is clear that," which is "nothing will justify a means except an end's value" is our conclusion. This leads us to (C), which is a paraphrase of this last clause of the stimulus. Does this make sense? Let us know if you have any other questions!