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

[EX Q]: The bear in the wild needs to find other animals to feast. (A) they are killers (B) they only eat (C) they never kill (D) they are docile
[EX A]: A

[EX Q]: Science fact: as the sale of a product decreases , the amount of money made by the person selling that product will decrease.  However, sales could possibly grow with (A) bad press (B) eclipse (C) price increases (D) advertising
[EX A]:
D