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 ship navigates with a magnetic compass because it is (A) predictable (B) unpredictable (C) waterproof (D) tradition
[EX A]: A

[EX Q]: if a river ran through a region, what would be found close by? (A) land mass susceptible to water encroachment (B) active life coral reef (C) acid rain susceptible area (D) very active volcanic mountains
[EX A]: A

[EX Q]: A lot of deep dips in an expanse of land could have happened (A) over a month (B) over a decade (C) over a year (D) over a millennia
[EX A]:
D