instruction:
You are given a science question (easy-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:
Earth is composed of layers of material with different properties. Which of the following is most likely to be in constant motion?
(A) core (B) mantle (C) oceanic crust (D) continental crust
answer:
B

question:
At a weightlifting competition, two competitors lifted the same weight to the same height. The second competitor accomplished the lift 2 seconds faster than the first competitor. This demonstrated that the second competitor had more
(A) energy than the first. (B) inertia than the first. (C) power than the first. (D) work than the first.
answer:
C

question:
How should researchers share their findings with other scientists to validate their study of the effectiveness of a new medication?
(A) e-mail the research results to local newspapers (B) publish the research results in a scientific journal (C) publish the results in brochures for doctors (D) discuss the research results on the Internet
answer:
B