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]: Which sustains life yet stopped growing? (A) air (B) a bush (C) a rock (D) a felled tree
[EX A]: D

[EX Q]: do all insects have to undergo every stage of change before becoming full grown? (A) all of these (B) insects are born live (C) pupa stage is sometimes skipped (D) pupa is a required stage
[EX A]: C

[EX Q]: Which uses electrical energy to function? (A) liver (B) tree (C) dog (D) iPod
[EX A]:
D