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

[EX Q]: Which of the following, when plugged into an outlet, completes a circuit? (A) gold (B) glass (C) plastic (D) rubber
[EX A]: A

[EX Q]: scientists make observations and cats (A) regurgitate their cleanings (B) never sleep (C) fly (D) cook spaghetti
[EX A]:
A