Programmed Cell Death,apoptosis,plays a Major Role in All of the Following

Multiple Choice

Programmed cell death,apoptosis,plays a major role in all of the following developmental situations except:
_____.

A) growth of nerves and blood vessels into a body segment
B) sculpting of digits in the developing hindlimb
C) growth of the atrial septum in the four-chambered mammalian heart
D) disappearance of the embryonic tail in developing humans