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]: 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]: As vehicles become more efficient petro consumption (A) increases (B) stops (C) decreases (D) stay the same
[EX A]: C

[EX Q]: Which phenomenon is studied about once annually? (A) planes departing (B) cats purring (C) geese travelling (D) rats flying
[EX A]:
C