Jayda and Thomas Have Been Happily Married for Five Years

Multiple Choice

Jayda and Thomas have been happily married for five years.After sex,both experience feelings of satisfaction and contentment.Studies have found that unlike couples who "hook up" for one night,Jayda and Thomas will experience a surge of the hormone ________,which accounts for this feeling of satisfaction and contentment.

A) prolactin
B) serotonin
C) estrogen
D) testosterone