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: Obstacles that might impede a dune are (A) God (B) emotions (C) cacti (D) cancers

SOLUTION: C

PROBLEM: Animals adapt to their what? (A) appearance (B) feet (C) skin (D) nature places

SOLUTION: D

PROBLEM: Sycamores have the worlds largest (A) trunk (B) friends (C) leaves (D) location

SOLUTION:
A