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").

[EX Q]: What requires photosynthesis to grow? (A) hills (B) planets (C) flora (D) people
[EX A]: C

[EX Q]: What contains nutrients for plants? (A) dirt cheap (B) wind (C) ground minerals (D) soiled clothes
[EX A]: C

[EX Q]: Which can best be described as hibernation for most amphibians? (A) a brain dead frog in mud (B) a frog napping for an hour in mud (C) a frog burying itself in mud for months (D) a frog sleeping for the night in mud
[EX A]:
C