Which of the Following Statements Is True About Male Fetuses

Which of the following statements is true about male fetuses in the fetal stage of prenatal development?

A) Male fetuses tend to be more active than female fetuses.
B) Male fetuses tend to be conceived less often than female fetuses.
C) Male fetuses tend to have higher levels of immunity than female fetuses.
D) Male fetuses tend to be less likely than female fetuses to be spontaneously aborted.