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: Different units of measurement are more useful in some settings than in others. Which unit of measurement is most used when comparing distances within the solar system?  
 (A) the mile (B) the kilometer (C) the light year (D) the astronomical unit

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

A: A
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Q: In a lake near a farm the growth of algae suddenly increased. This increase was most likely due to which of the following?  
 (A) a decrease in air temperature (B) a decrease in water level (C) fertilizer runoff from the farm (D) exhaust gases from farm equipment

A:
C
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