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]: What could be used as an electrical conductor (A) A penny (B) Shoe laces (C) Wood (D) A button
[EX A]: A

[EX Q]: Energy may be transferred to an object without being plugged in, such as with (A) an electric grill (B) an electric stove (C) an electronic torch (D) a microwave oven
[EX A]:
C