instruction:
You are given a science question (hard-level) and four answer options (associated with "A", "B", "C", "D"). Your task is to find the correct answer based on scientific facts, knowledge, and reasoning. Do not generate anything else apart from one of the following characters: 'A', 'B, 'C', 'D'. There is only one correct answer for each question.
question:
Which of the following is the farthest from Earth?
(A) Halley's comet (B) the Andromeda galaxy (C) Neptune (D) the Sun
answer:
B

question:
Where does evaporation occur at the HIGHEST rate?
(A) rivers (B) streams (C) estuaries (D) glaciers
answer:
C

question:
A group of students have decided that the amount of electricity used by the school should be reduced. The students want to develop a plan to solve this problem. What should the group do first?
(A) determine what materials should be used to implement the plan (B) conduct research on energy conservation to form the plan (C) improve the design of the plan (D) test the validity of the plan
answer:
B