A friend says, "Stars produce energy by a fusion chain reaction of helium into hydrogen." Evaluate the validity of this statement. A) It is an valid statement. Stars produce energy by a fusion chain reaction of hydrogen into helium. B) It is an invalid statement. Stars produce energy by a fusion chain reaction of hydrogen into helium. C) It is an invalid statement. Stars produce energy by a fission chain reaction of hydrogen into helium. D) It is an valid statement. Stars produce energy by fission and fusion chain reactions of hydrogen into helium and vice versa.
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