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]: When is fog most likely to occur (A) 3 p.m. (B) midnight (C) 6 p.m. (D) noon
[EX A]: B

[EX Q]: Birds sometimes eat what? (A) grass (B) underground crawlers (C) insecticide (D) trees
[EX A]: B

[EX Q]: Hardness of minerals may be measured in certain ways, such as what? (A) heating the minerals to high temperatures (B) applying pressure using a sharp, tough object in order to leave marks (C) hitting the minerals with a tougher stone (D) taking bits of metal and comparing the texture to the minerals
[EX A]:
B