Dawn, a young single mother, found a wallet with a large amount of money inside. She has found lost wallets in the past, too. Previously she has always tried to return the cash to the owner, knowing it is the right thing to do. However, money has been very tight lately, so this time she has decided to keep the cash. She told a friend, "I don't normally do this, but we really need the money. So I really have to do it this one time." The most likely explanation for Dawn's behavior is:
a. a depression disorder.
b. the holier-than-thou effect.
c. the need-to effect.
d. sociocultural forces.
e. motivated blindness.