All of the Following Reasons Have Contributed to the Increase

All of the following reasons have contributed to the increase in C section births except for which one?

A) The average age at which women give birth has risen, thereby increasing the possibility of vaginal birth complications.
B) C sections pose fewer risks to the mother's health than vaginal delivery.
C) More mothers are personally choosing to have C sections for a variety of reasons.
D) C sections are twice as profitable for hospitals than are uncomplicated vaginal births.