Mammals reproduce through a process called sexual reproduction. During this process, which involves two parents,

A. a female egg cell and a male sperm cell each develop separately into an offspring that is identical to its parent.

B. a female egg cell and a male sperm cell each develop separately into an offspring that is different from both parents.

C. a female egg cell combines with a male sperm cell to make an offspring that is identical to one of the parents.

D. a female egg cell combines with a male sperm cell to make an offspring that is different from both parents.