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: What contains nutrients for plants? (A) dirt cheap (B) wind (C) ground minerals (D) soiled clothes

SOLUTION: C

PROBLEM: How long does it take Earth to fully revolve one time (A) 28 hours (B) 46 hours (C) 1400 minutes (D) 1440 minutes

SOLUTION: D

PROBLEM: Which of the following crops was the first staple in the human diet? (A) wheat (B) barley (C) corn (D) rice

SOLUTION:
A