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: We can calculate a speed if we know a number of (A) gallons (B) millimeters (C) dollars (D) pounds

SOLUTION: B

PROBLEM: When is fog most likely to occur (A) 3 p.m. (B) midnight (C) 6 p.m. (D) noon

SOLUTION: B

PROBLEM: Which is bad for the environment? (A) recycling old goods (B) using a generator (C) protecting nature (D) eating food

SOLUTION:
B