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 dog's ears may be as thin as its (A) friend's (B) neighbor's (C) father's (D) owner's
answer:
C


question:
A mountain top heats and lava flows, resulting in (A) a hot golden leaf (B) a cold deep sea (C) a raised portion of land (D) a sunken valley of ice
answer:
C


question:
What would be a source of the smoothest rocks? (A) a riverbank (B) the cliffs (C) the desert (D) the mountains
answer:

A