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]: As vehicles become more efficient petro consumption (A) increases (B) stops (C) decreases (D) stay the same
[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]: Why are ferrous metals magnetic? (A) The shiny reflective coating (B) They are very heavy. Their weight. (C) The iron contained inside of them (D) The copper in all of them
[EX A]:
C