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").

[EX Q]: A person is in the forest, lost. They need to signal to others that they are there, and their voice is gone, so they need to do it inaudibly. The person may signal with (A) fire (B) rain (C) leaves (D) ducks
[EX A]: A

[EX Q]: Which would likely lessen the impact of climate change the most? (A) Earth Day (B) hurricanes (C) tsunamis (D) wildfires
[EX A]: A

[EX Q]: What displays the movement of electrons from the base atoms? (A) venus (B) mercury (C) plasma star (D) pluto
[EX A]:
C