instruction:
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").
question:
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
answer:
C


question:
Rocket engines can lift rockets because (A) of how much fuel they use (B) of how fast they are (C) of the power the hit the ground with (D) of how tall they are
answer:
C


question:
Which is the most likely factor for the amount of available ocean space increasing? (A) glaciers cooling down vastly (B) glaciers getting much hotter (C) land space increasing tenfold (D) land shrinking over time due to cold
answer:

B