How to decide between 50/50 answer choices (spoiler from AAMC FL3)

Stuck b/w A and C. Only when I reviewed the answer did I say, \"oh yeah, smooth muscle does propel food.\"

Stuck b/w A and B. My gut told me B, but I spent over 3 minutes here debating b/w the two.

Hi guys, I have so much trouble with questions like these. I already spend too much time per question and am learning to manage self-doubt. Is there any way to tackle questions like this so that it's much easier for me to handle?