Which piece of evidence is LEAST relevant to Anne Campbell's theory concerning the function of oxytocin?

A) Oxytocin increases during childbirth.
B) Oxytocin is related to fight-or-flight behaviors.
C) Oxytocin is related to sexual activity and orgasm.
D) Oxytocin is related to breast feeding.

Anne Campbell's theory concerning the function of oxytocin focuses on its role in bonding and social behaviors, such as those seen in childbirth, sexual activity, and breastfeeding. The fight-or-flight response, which is a reaction to acute stress, is less relevant to her theory that emphasizes oxytocin's role in positive social and reproductive behaviors.