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").

Why would a lightbulb be dark? (A) the bulb needs to be charged (B) the room is too bright (C) the circuit is incomplete (D) it ran out of electricity
C

positively impact your bodies strength by (A) dead-lifting (B) thinking (C) sleeping (D) singing
A

An example of biofuel could be (A) metal (B) the sun (C) leaves (D) the wind

C