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 vehicle stops when brakes are pressed because (A) the tires are being halted by pressure (B) the streets are bumpy (C) the roads have friction (D) the tires are unable to create friction
answer:
A


question:
A bird in an arid place can find water, despite a lack of puddles, lakes or rainfall if it (A) pokes a tough plant (B) eats a small stone (C) takes out a loan (D) cries for a minute
answer:
A


question:
What doesn't eliminate waste? (A) plants (B) mushrooms (C) bacteria (D) robots
answer:

D