Which of these principles of evolution,as described by Darwin's theory,is correctly matched with its role in evolution?

A)Principle of variation: Offspring must resemble their parents more than they resemble unrelated individuals.
B)Principle of selection: Variation in morphology,physiology,and behavior must be present in a population for selection to occur.
C)Principle of variation: Variation in morphology,physiology,and behavior must be present in a population for selection to occur.
D)Principle of heredity: Some genotypes of a population should be more successful at surviving and reproducing than other genotypes in a given environment.
E)None of the answer options are correct.