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:
What becomes smoother through weathering? (A) rainbow (B) water (C) cat (D) pumice
answer:
D


question:
A person wants to turn on an MP3 player, so they complete a circuit by (A) pressing a button (B) singing to it (C) making a face (D) crossing their fingers
answer:

A