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]: Which is a byproduct of a lightbulb? (A) taste (B) death (C) warmth (D) sound
[EX A]: C

[EX Q]: What does a tuna have that causes it to swim faster than a seahorse? (A) Lower body temperature (B) Bigger scales (C) Bigger fins (D) Thicker caudal fin
[EX A]:
C