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]: What is it called when a cell converts oxygen and carbohydrates into carbon dioxide, water, and energy? (A) adaptation (B) breathing (C) food transformation (D) catabolic reactions
[EX A]: D

[EX Q]: Adding something poisonous to an environment and harming it is called what? (A) dirtying (B) liking (C) cleaning (D) observing
[EX A]: A

[EX Q]: A young boy is reprimanded by his mother for sleeping with his heavy blankets over his head. His mother is worried that if the boy continues to sleep like that, he will suffocate. This is because (A) beds can cause issues with breathing (B) breathing at night is deadly (C) CO2 in large amounts is fatal (D) CO2 can be ambivalent
[EX A]:
C