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").

A light using energy can cease that activity when (A) light bulbs are gold (B) lights are always on (C) wall switch is adjusted (D) walls are painted blue
C

The everglades where nearly wiped out by (A) the sun (B) builders (C) sea cows (D) alligators
B

A tone is made when a hammer makes contact with (A) a waterfall (B) air (C) an solid object (D) a log
C