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]: Digestion is when stomach acid breaks down what? (A) food essays (B) sustenance (C) water (D) air
[EX A]: B

[EX Q]: Which of the following would you use to most efficiently transport heat? (A) empty water bottle (B) cotton T-Shirt (C) baseball cap (D) empty soda can
[EX A]: D

[EX Q]: Which child's plaything is inflated with gas when it's in use? (A) Nintendo (B) Miracle Bubble (C) Bicycle (D) Sidewalk chalk
[EX A]:
B