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").

[EX Q]: Battery powered vehicles have less emissions than (A) lawnmowers (B) wind turbines (C) solar power (D) dragsters
[EX A]: D

[EX Q]: pushing against a rolling boulder will decrease its (A) size (B) height (C) impetus (D) ambitions
[EX A]: C

[EX Q]: Hitting the keys of a piano is like playing (A) a lute (B) a broadcast (C) a concert (D) a recital
[EX A]:
A