TASK DEFINITION: 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.
PROBLEM: Which of the following has the least momentum?  
 (A) a 0.5 kg mass with a 1000 m/s velocity (B) a 1 kg mass with a 100 m/s velocity (C) a 10 kg mass with an 11 m/s velocity (D) a 100 kg mass with a 2 m/s velocity

SOLUTION: B

PROBLEM: Which of these is not a benefit of microorganisms?  
 (A) They release nutrients in soil. (B) They help make antibiotics. (C) They cause food to spoil. (D) They break down waste.

SOLUTION: C

PROBLEM: Approximately how many times does the Moon revolve around Earth during one revolution of Earth around the Sun?  
 (A) 1 (B) 12 (C) 28 (D) 365

SOLUTION:
B