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]: Which would likely decrease the food in an environment? (A) gravity (B) water evaporation (C) a tree (D) time
[EX A]: B

[EX Q]: a student leaves a nail line on a mineral sample, so that mineral can be described as what? (A) a mineral (B) a soft mineral (C) a liquid mineral (D) a mineral melt
[EX A]: B

[EX Q]: The chillier time of the year below the equator occurs while above the equator is (A) wearing thick coats (B) ice fishing (C) wearing swimsuits (D) adding blankets
[EX A]:
C