It Is Thought That Hormones Produced by the Fetus in Response

It is thought that hormones produced by the fetus in response to the stress of the birth process:

A) are physically dangerous and psychologically traumatic.
B) have no particular beneficial or harmful effects on the fetus.
C) are physically harmful to the fetus, though the effects are not long-lasting.
D) help in adjusting the fetus's respiration and circulation to life outside the womb.