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: How does erosion impact a river? (A) enlargening (B) warming (C) heightening (D) shrinking

SOLUTION: A

PROBLEM: Once the grounds frost over and the air grows chilled (A) beaches are opened (B) humans go naked (C) birds lay eggs (D) roses die

SOLUTION: D

PROBLEM: polar bears are white due to an inherited (A) characteristic (B) coat (C) snow (D) fur length

SOLUTION:
A