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").

[Q]: If something is in an ecosystem, it could be (A) invisible (B) vacuum of space (C) lacking life (D) alien
[A]: C


[Q]: When I hear news of a warm front I make sure to bring (A) game boy (B) clocks (C) guns (D) waterproof appendage covers
[A]: D


[Q]: When a creature experiences feeling, they are likely (A) making really good choices (B) taking the next train (C) sensing a thing's texture (D) dead from complete exhaustion
[A]:
C