According to Guthrie, if I wish to acquire the habit of leaving my keys on the hallway table when I enter the house, I should
a. deliberately and repeatedly practice entering the house and leaving the keys on the table.
b. punish my behavior when I happen to leave my keys elsewhere.
c. reinforce my behavior when I happen to leave my keys there.
d. both reinforce my behavior when I happen to leave my keys there and punish my behavior when I happen to leave my keys elsewhere.
Answer: A