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: What type of force keeps the planets orbiting the Sun?  
 (A) gravitational (B) magnetic (C) electrical (D) nuclear

A: A
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Q: To which group does an animal belong if it lays eggs and has scales and gills?  
 (A) amphibian (B) bird (C) fish (D) reptile

A: C
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Q: Why are seals able to live off the coast of Antarctica while frogs, snakes, and panthers are not?  
 (A) Seals can swim. (B) Seals are predators. (C) Seals have fur and blubber. (D) Seals are warm-blooded animals.

A:
C
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