instruction:
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").
question:
A star produces light energy and heat because it has a variety of (A) moon rotation causing friction (B) light energy flowing to earth (C) reactions of nuclear form (D) global warming caused by co2
answer:
C


question:
Flora requires chlorophyll to (A) moonlight (B) undergo natural development (C) starlight (D) dairy
answer:
B


question:
When a needle points north on a compass and you are thirsty (A) head south (B) head towards water (C) head forward (D) head north
answer:

B