Self-study
Political scientist: When a bill comes before a legislative body, the majority of the representatives are usually prepared to vote for it. █████████ ████ █ ████ ██ ██ █████ ████████ ██ ███ ████████ ██ ███ █████████ █ ██████████ █████████ ███ ███████ ██ ███ ████ ██ ███████ █████████ ████████ ███ ███████ ████ ████ ████ ███████████ ███ ███████████ ████████ ████ ███ ████ ████████ ██ █████ ██ ███████████ ██████████ ██ █ █████ ████ ██ ████████████████
Summary
When a bill comes before a legislative body, most representatives are prepared to vote for it. Most of the time, when a bill is unlikely to get approval by the majority, compromise regarding the content is possible. When the bill concerns an issue of fundamental importance to a large bloc of representatives, compromise is impossible. 
Notable Valid Inferences
In a Must Be False question, the four wrong answers could be true. The correct answer will contradict something that must be true based on the stimulus. Since we know that when approval is unlikely, compromise is usually possible, and that in order for compromise to be possible, the bill cannot concern an issue of fundamental importance to a large bloc of representatives, we can infer that when approval is at first unlikely, usually the bill does not concern an issue of fundamental importance to a large bloc of representatives. We can predict that the correct answer might contradict this inference.
24.
If the political scientist's statements ███ █████ █████ ███ ██ ███ █████████ ████ ██ ██████
a
Compromises regarding issues ██ ███████████ ██████████ ██ █████ █████ ██ ███████████████ ██ ███ ███████████ ███████ ██ ███ ██████ ███ ███████ ██ ███ ████ ████ ████
Must be true. The stimulus tells us that compromise is not possible when a bill concerns issues of fundamental importance to a large bloc of representatives. Therefore, this type of compromise does not enable the passage of any bill into law.
b
Most bills that ██ ███ ███████ ███ ██████ ██ ███████████ ██████████ ██ ███ █████ ████ ██ ███████████████ ██ ███ ███████████ ████ ████ ████
Could be true. We don’t have any information in the stimulus to contradict this idea. It is possible that most of these types of bills pass into law, if there are any at all.
c
Most bills concerning ██████ ██ ███████████ ██████████ ██ █ █████ ████ ██ ███████████████ ████ ████ ███ ██ █ ██████ ██ ███████████ ████ ███ ██████ █████████
Must be false. As shown on our diagram, compromise is possible only if the bill does not concern issues of fundamental importance to a large bloc of representatives. So if a bill concerns issues of fundamental importance, then there cannot be any compromise. 
d
Most bills concern ██████ ██ ███████████ ██████████ ██ ██ █████ ███ █████ ████ ██ ███████████████ ██ ███ ████████████
Could be true. We don’t have any information in the stimulus about the content of most bills. We know that if a bill involves fundamental importance, there cannot be a compromise. But this doesn't tell us the proportion of bills that concern fundamental importance.
e
Most bills do ███ ███████ ███ ██████ ██ ███████████ ██████████ ██ ███ █████ ████ ██ ███████████████ ██ ███ ████████████
Could be true. We don’t have any information in the stimulus about the content of most bills. We know that if a bill involves fundamental importance, there cannot be a compromise. But this doesn't tell us the proportion of bills that concern fundamental importance.