In this task, you are given a multiple-choice question and you have to pick the correct option. Answer with option indexes (i.e., "A", "B", "C", and "D").

Rocket engines can lift rockets because (A) of how much fuel they use (B) of how fast they are (C) of the power the hit the ground with (D) of how tall they are
C

What is an example of reproduction occurring in adulthood? (A) humans are unable to reproduce until they are legal adults (B) eggs are unable to be fertilized before they are dropped (C) dogs are unable to have puppies until they are two years old (D) cats are unable to produce offspring until they are sexually mature
D

A moth undergoes what? (A) migration (B) stage conversion (C) amelioration (D) surgery

B