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 did some ancient societies use to reflect light? (A) wood (B) plants (C) clothing (D) rocks
[EX A]: D

[EX Q]: Which most likely requires the aid of specialized tissues at the ends of stems? (A) human assisted space travel (B) the quick growth of bamboo (C) cats digging with their claws (D) the slow growth of mammals
[EX A]: B

[EX Q]: Which uses a nonrenewable resource? (A) wind chimes (B) solar-powered car (C) a B52 Bomber (D) a bicycle
[EX A]:
C