TASK DEFINITION: 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").
PROBLEM: Digestion is when stomach acid breaks down what? (A) food essays (B) sustenance (C) water (D) air

SOLUTION: B

PROBLEM: Gas can fill any container it is given, and liquid (A) is standard weight and size (B) is the opposite of variable (C) only needs a few (D) uses what it needs

SOLUTION: D

PROBLEM: the earth is the source of (A) joy (B) natural resources (C) humanity (D) intellegence

SOLUTION:
B