I just wrote this post on a similar question.
I think it would be helpful for you to go to main idea reading comp questions that use these words: "Explain," "Evaluate," "contrast," etc. and do the drill I lay out below. This will get you thinking and specifying what *you* think the passage would need to say/be/look like in order to justify the words 'explain,' 'contrast,' etc. There's no one marker, but you can think about what a passage that 'contrasts different points of view regarding a certain piece of legislation' would have to *be* for that to be the primary purpose.
The post I wrote in ther other thread is below:
Here's a drill I recommend for this kind of thing. I call it "Reverse Reading Comp." Note this is not at ALL how you should take the actual test.
Go to an RC question *before* reading the passage. For instance, I'll look at the question you provided (without reading the passage). And *write out* exactly what the passage would need to say/be in order to justify choosing that answer choice. So:
Quote:
3. The passage is primarily concerned with
(A) presenting various groups' views of the motives of those proposing certain legislation
The passage would need to talk about legislation. It would need to discuss *why* certain people want to propose this legislation. Then there would need to be various groups who have different groups who either have different opinions about those motives (I take this to mean either "different groups disagree on the motives" OR "the true motives are known, and different groups have different opinions about those motives").
Quote:
(B) contrasting the reasoning of various groups concerning their positions on certain proposed legislation
The passage would need to talk about certain legislation that different people have different beliefs about, and different reasons for those beliefs. The passage would compare those reasons/beliefs.
[NOTE: The person who asked about this question was confused between A and B, so I asked them to look at the difference in what would make either answer 'right.' A is a comparison of some groups' views about *the motives of people supporting legislation*. B is a comparison of *people's opinions concerning the legislation*
So A would be either, "Group 1 thinks the motives of the people supporting the legislation are X. Group 2 thinks those motives are Y." Answer B is "Group 1 thinks this about the legislation, Group 2 thinks Y."].
Quote:
(C) tracing the process whereby certain proposed legislation was eventually enacted
This would lay out the process that led to a piece of legislation getting enacted. It would 'tell a story' of some kind.
Quote:
(D) assessing the success of tactics adopted by various groups with respect to certain proposed legislation
The passage would need to talk about certain proposed legislation and have various groups who, for whatever their opinions were about the legislation, adopted certain 'tactics' (presumably to sway opinion about the legislation). The passage would say which tactics worked and which did not.
Quote:
(E) evaluating the arguments of various groups concerning certain proposed legislation
The passage would need to discuss proposed legislation, and talk about various groups' arguments about it. The passage would evaluate the arguments--so would probably lay out which were better and which were worse, or which were convincing and which were not. The difference in B is that there's an evaluation. B is just 'here are the various groups' opinions and reasons.' E is 'Here are their reasons, and here's my thoughts whether these reasons are good or bad.'
After you do this, THEN you read the passage. And you decide which of the paragraphs you've written for each answer choice best matches what is actually written.
It's far, far too easy to let the passage and the questions 'bleed' together. And that's understandable--we're trying to answer a question about the passage. But the truth is, the question itself is just a collection of 'thoughts.' You're looking for which of those thoughts is either IN or LOGICALLY IMPLIED BY the thoughts *in the passage*. It helps to practice understanding the thoughts of the question *in isolation*. After that it's just a matching game.