Advice on studying for AP Euro?

I’m taking the AP Euro exam next week, and this past week, we had mock MC tests in class, and I’ve been doing poorly on them. I have trouble with questions that have 2 answers that are correct, but one is “more correct” than the other.
I need to review content, but I’m so overwhelmed and I don’t know where to start, there’s so much stuff to know.

Any tips?