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]: One type of electrical circuit that requires a switch could be (A) running (B) diving (C) dimming table lights (D) swimming
[EX A]: C

[EX Q]: Consumers eat other what? (A) oxygen (B) animal toys (C) rays (D) weaker bugs
[EX A]: D

[EX Q]: What activity changes the local environment the most? (A) people sometimes camping (B) moderate rain (C) over-logging (D) rabbit breeding
[EX A]:
C