I think that being able to identify the conclusion/argument in the stimulus is the most important skill for these types of questions.

I've been having success through looking at the conclusion of each answer choice and narrowing it down to the two that most mirror the stimulus. Then deep-diving from there.

Am I able to speed up all videos. I am able to on some videos, and not able to on others.

I have not struggled on any other section besides this one...

I was mistakenly doing an except-only question...

Is my understanding sound?:

Subset membership is sufficient for superset membership, but not necessary. (Being a part of a subset is a valid way to be a part a superset. But not the only way to be a part of the superset)

Superset membership is necessary for subset membership, but not sufficient. (If you're a part of a subset, then you are automatically a part of the superset. However, being under the umbrella of a superset does not automatically mean that you fit in the subset)