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:
Which likely increased atmospheric CO2 recently? (A) sustainable fisheries (B) electric cars (C) motorcycles (D) ant populations
answer:
C

question:
Jenny was outside facing her house holding a compass. The needle of the compass was facing her house. Staying in one place she turned around and around, stopping several times. She noticed that whichever way she faced (A) the compass's needle was facing straight ahead (B) the compass's needle was facing the house (C) the compass's needle was facing her back (D) the compass's needle was facing the west
answer:
B

question:
If rain is something other than clean, then water in that area will (A) be unsafe (B) be great (C) be safe (D) be clean
answer:
A