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:
Digestion is when stomach acid breaks down what? (A) food essays (B) sustenance (C) water (D) air
answer:
B


question:
In a zoo, a polar bear exhibit will contain (A) salt (B) cacti (C) strong fans (D) sand
answer:
C


question:
What are a source of fibers? (A) water (B) plantlife (C) rocks (D) air
answer:

B