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: Scraping the side of a cliff may result in (A) ice (B) snow (C) sand (D) wood chips

SOLUTION: C

PROBLEM: which form of transportation has zero emissions? (A) motorbikes (B) speed boats (C) hybrid cars (D) pedal bikes

SOLUTION: D

PROBLEM: If an environment experiences a long drought (A) ponds may dry up and kill off the fish population (B) plants will continue to flourish (C) animals will experience a boom in reproduction (D) tadpoles will mature faster into frogs

SOLUTION:
A