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]: 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
[EX A]: C

[EX Q]: Sunlight can (A) make eyes more visible (B) bounce from a rod (C) create a real problem (D) blind a garden gnome
[EX A]: B

[EX Q]: Some people put metal tags on their dog's collars, because in darkness, these collars can (A) melt wax (B) reflect light (C) read books (D) stain clothes
[EX A]:
B