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.

[Q]: An object such as a hammer weighs less on the Moon than on Earth. This is because the Moon has a  
 (A) thinner atmosphere than Earth. (B) smaller diameter than Earth. (C) stronger magnetic field than Earth. (D) lower mass than Earth.
[A]: D


[Q]: Which process causes water to move from the ocean to the atmosphere during the formation of a hurricane?  
 (A) condensation (B) evaporation (C) precipitation (D) runoff
[A]: B


[Q]: What renewable energy source used to make electricity is thought to be always available?  
 (A) oil (B) coal (C) wind (D) nuclear
[A]:
C