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.

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
B

When animals use energy, they produce  
 (A) nitrogen (B) iron sulfide (C) oxygen (D) carbon dioxide
D

Which layer of the atmosphere contains about 75% of the gasses and almost all of the water vapor?  
 (A) troposphere (B) stratosphere (C) mesosphere (D) thermosphere

A