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.
--------
Question: In animal skin tissue, cell division is responsible for
(A) growth and repair (B) sexual reproduction (C) obtaining energy (D) production of sex cells

Answer: A

Question: Which of the following is most likely to disrupt the natural balance in an ecosystem?
(A) introduction of a non-native species (B) reduced daylight hours during winter (C) preventing the cutting of trees in forests (D) riverbank erosion resulting from springtime flooding

Answer: A

Question: A company is making prototypes for a new computer system. Which of the following statements best describes an advantage of making several different prototypes?
(A) They can be tested at the same time. (B) They can be produced in large numbers. (C) They will be bought by many different users. (D) They will be sold for more than they cost to build.

Answer:
A