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]: Which statement best describes the development of a human embryo?  
 (A) A single cell becomes many cells. (B) Each cell has a different function. (C) Many cells combine to form one cell. (D) All the cells have the same function.
[A]: A


[Q]: Which process in the water cycle returns water from the surface of Earth to the atmosphere?  
 (A) condensation (B) evaporation (C) precipitation (D) runoff
[A]: B


[Q]: An abiotic factor that most influences the organisms living in a salt marsh is  
 (A) fish. (B) water. (C) predators. (D) grasses.
[A]:
B