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]: Grooves in the ground are a sign of (A) sink holes (B) erosion (C) water accumulation (D) high traffic
[EX A]: B

[EX Q]: What is the source of cooling that turns lava into land? (A) seawater (B) refrigerators (C) air conditioning (D) glaciers
[EX A]: A

[EX Q]: A bee will seek out a plant that advertises its (A) bright stem (B) tantalizing liquid (C) nice friend (D) green leaves
[EX A]:
B