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]: What would light bounce off of when it hits it? (A) a wall painted grey (B) old worn out leather (C) a freshly waxed car (D) a street made of gravel
[EX A]: C

[EX Q]: A good conductor of electricity would be (A) tree (B) coke bottle (C) your finger (D) coke can
[EX A]: D

[EX Q]: the mantle is (A) a level of our planet (B) the planet closest to ours (C) a kind of rock found on Earth (D) the deepest part of our planet
[EX A]:
A