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]: Adding salt to liquid decreases what? (A) light (B) energy (C) magnetism (D) thawing temp
[EX A]: D

[EX Q]: Why would a species camouflage as a dangerous animal? (A) to mate (B) to avoid crocodiles (C) to catch prey (D) to  build nests
[EX A]: B

[EX Q]: A polar bear is white because (A) it's a lame Turkish professor in a third rate Pennsylvanian college (B) it's covered in polar snow ice (C) it wants to make a Grizzly bear jealous (D) its parents had white fur
[EX A]:
D