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:
Adding salt to liquid decreases what? (A) light (B) energy (C) magnetism (D) thawing temp
answer:
D


question:
What is a source of oxygen through photosynthesis? (A) lakes (B) car engines (C) sunflowers (D) people
answer:
C


question:
which of these days would lead to a suspension of regular activities? (A) a very sunny day (B) a very beautiful day (C) a very bright day (D) a day with a blizzard
answer:

D