Mary, a 20-Something Administrator, Enjoys Going Out Every Weekend

Mary, a 20-something administrator, enjoys going out every weekend.One afternoon, while in the mall to exchange a pair of shoes, Mary spots a handbag sale.Despite making a strict resolution not to buy unnecessary goods, Mary weakens and buys a purse, a pair of jeans, and another new pair of shoes.This is an example of:

A) habitual decision making.
B) internal search for information.
C) postpurchase dissonance.
D) impulse buying.
E) external search for information.