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").

You can use what to fake sunlight for plants? (A) love (B) a flash light (C) breathing (D) water
B

the presence of which of these is required for the formation of cavernous chambers? (A) some carbonated soda (B) some carbon dioxide (C) some carbonic acid (D) carbon monoxide gas
C

Electricity causes less damage to the Earth's atmosphere than (A) Gasoline (B) Potatoes (C) The sun (D) Water

A