Answer:
A. They help maintain balance on both sides of a sentence, keeping coordinating ideas in similar forms.
The answer is bug because it can be told from the excerpt he has armor-like back and midriff is sepparated into sections.
A seemingly absurd or self-contradictory statement or proposition that when investigated or explained may prove to be well founded or true.
The foot-in-the-door method is basically a psychological method where you ask for a small request first, then a bigger one later. So I think it's A, just because the others don't work. B is just straight up asking for a big favor, C is providing you with the "must-do" effect, and D is simply a favor for a favor.
The price of the jeans would be $30. 50% of 30 is 15. 30 + 15 = 45.