Does anyone have any lesson recommendations or pointers on what to review if I'm consistently doing badly on all the questions in this section? Him going over the questions isn't really helping, as it quickly breezes past concepts I clearly seem to have a rocky foundation on.

Something that helped me rule out D, which was touched on in the video (but not as obviously), was the fact that the 'reasonable grounds' mentioned in the answer choice is acting on the fact that they need reasonable grounds to believe it was used it to conduct business, while the reasonable grounds in the passage was acting on the reasonable grounds for believing it contains evidence/legal proceedings.. part. Reasonable grounds acted on two different points.

Not sure it is completely the right way to go about it, but it helped me.

I understand with all given answer choices why it would be B, however, I was under the impression that the argument we are tasked to strengthen states that diets (oil,fat?) have little impact or negligible effects on protecting the heart. Why, then, would the best answer go in depth about specific oils in the Med diet protecting the heart?