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]: Why animal may use a rock as shelter (A) Centipede (B) Dolphin (C) Seagull (D) Dog
[EX A]: A

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

[EX Q]: If a deer eats a berry plant, the plant eats (A) a berry juice slurry (B) large slices of meat (C) its self created nutriment (D) small bugs that glow
[EX A]:
C