Which best explains why hemophilia is more common in males than in females?

A. Hemophilia is caused by a dominant allele.

B. Hemophilia only occurs in the presence of male hormones.

C. The hemophilia allele is located on the X chromosome, and males have only one X chromosome.

D. The hemophilia allele is located on the Y chromosome, and females do not have a Y chromosome.

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