If findings from the prairie vole can be applied to human pair bonding, you would expect that a monogamous couple may show ________ than do promiscuous couples.

a. lower brain levels of vasopressin (males) and oxytocin (females)
b. loss of cells in the spinal cord
c. increased release of prolactin during pair formation
d. greater brain levels of vasopressin (males) and oxytocin (females)
e. loss of cells in the frontal cortex

Answer: d. greater brain levels of vasopressin (males) and oxytocin (females)