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: Thick feathers can be used for (A) climbing, cracking nuts and peeling fruit skins. (B) courtship and looking for food (C) killing prey, preening and feeding young (D) staying weatherproof, flexible and free of bacteria

SOLUTION: D

PROBLEM: John Muir would likely set aside an area for (A) superheroes and villains (B) oaks and chipmunks (C) bankers and politicians (D) cars and boats

SOLUTION: B

PROBLEM: why must a cell delegate its essential functionalities? (A) all of these (B) to maximize work distribution (C) to avoid extra work (D) to catch its prey

SOLUTION:
B