In the Section "Investigating Life: Addicted to Affection",what Hypothesis Were

In the section "Investigating Life: Addicted to Affection",what hypothesis were the scientists examining?

A) Monogamous social attachments will form when hormone receptors are located in a region of the brain that derives feelings of reward.
B) Monogamous social attachments will form when hormone receptors are located in a region of the brain that derives feelings of aggression.
C) Higher levels of antidiuretic hormone (ADH) are found in organisms that form monogamous social attachments.
D) Lower levels of antidiuretic hormone (ADH) are found in organisms that form monogamous social attachments.
E) Antidiuretic hormone (ADH) is absent in organisms that form monogamous social attachments.