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 plant's roots break down rocks as the roots do what? (A) decay (B) grow old (C) develop (D) dcerease
[EX A]: C

[EX Q]: Due to camouflage, you are less likely to be able to see a polar bear in (A) a church (B) the zoo (C) alaska (D) africa
[EX A]: C

[EX Q]: when the earth's plates grind against each other it can be detected with a (A) tape measure (B) ruler (C) seismograph (D) geiger counter
[EX A]:
C