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]: Which of the following actions can make electrical energy brighten your room? (A) Clap on! (B) Jumping in place (C) Turning a doorknob (D) Rubbing your nose
[EX A]: A

[EX Q]: Buttercups can produce (A) their own nutrients (B) grow in space (C) ride horses (D) enter singing competitions
[EX A]: A

[EX Q]: A tree must depend upon, for its support (A) A large fibrous mass (B) plants on the forest floor (C) the wooden welfare state (D) massive redwoods on the backs of turtles
[EX A]:
A