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 can be found on the moon? (A) Non-volcanic Mountains (B) Life-filled Oceans (C) Volcanic Mountains (D) Multiple Land Masses
[EX A]: A

[EX Q]: What is a source of oxygen through photosynthesis? (A) lakes (B) car engines (C) sunflowers (D) people
[EX A]: C

[EX Q]: Which is an electrical energy conductor? (A) cobalt (B) plastic (C) concrete (D) mahogany
[EX A]:
A