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 glacier moved through an area years and years ago, and scientists can tell this by (A) looking at the moon (B) looking at the dogs (C) looking at the sky conditions (D) glancing at nearby stone
answer:
D


question:
A tone is made when a hammer makes contact with (A) a waterfall (B) air (C) an solid object (D) a log
answer:
C


question:
if a person is unable to stand cold weather, which of these should be avoided? (A) the arctic regions (B) all of these (C) tropical rain forest (D) the mangrove forest
answer:

A