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 shoe seems gold and green at first, then at second glance looks blue and silver. This could be due to (A) interrogation (B) comas (C) refractions (D) cellulite
answer:
C


question:
When the old man was much younger, he still had (A) brown eyes (B) baldness (C) gray hair (D) wrinkled skin
answer:
A


question:
a decline in the number of predators often leads to (A) a rise in the number of prey (B) an increase in breeding between predators (C) a decline in the number of prey (D) a decrease in breeding between prey
answer:

A