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.

[EX Q]: A puppy has traits from its mother and its father. Which of these structures provides genetic information from the father to the puppy?  
 (A) a muscle cell (B) a nerve cell (C) a blood cell (D) a sperm cell
[EX A]: D

[EX Q]: Which organisms contribute most to the decomposition of dead organisms?  
 (A) snakes (B) viruses (C) insects (D) bacteria
[EX A]: D

[EX Q]: During the early 1990s, people began using cell phones to communicate. The development of the cell phone was most likely a response to the need of society to  
 (A) be able to communicate when sick. (B) provide a safer method of communicating. (C) provide more jobs in the communication industry. (D) be able to communicate when away from home.
[EX A]:
D