TASK DEFINITION: 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").
PROBLEM: 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

SOLUTION: C

PROBLEM: Why is it fall one month and spring another month? (A) the moon has different phases (B) the earth is revolving (C) solar flares appear in cycles (D) the earth is in a different place in its orbit

SOLUTION: D

PROBLEM: A thermal insulator slows the transfer of what? (A) warmness (B) light (C) energy (D) liquid

SOLUTION:
A