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]: Sleet is (A) potentially dangerous (B) poison (C) hot (D) unhealthy
[EX A]: A

[EX Q]: The Norwegian government maintains a special storage chamber 800 miles from the Arctic Circle for use in the event of a man-made or natural disaster. The storage structure is built in Arctic permafrost and holds (A) seeds that are growing now (B) seeds for the Arctic animals (C) seeds that spread the permafrost (D) preserved seeds for reproducing edible crops
[EX A]: D

[EX Q]: Carbonic acid dissolves what to form caverns? (A) air (B) water (C) grass (D) sediment
[EX A]:
D