Which of the following scenarios best illustrates reinforcement in purchasing decisions?
a. A chef purchases mushrooms for a second time from a wholesaler, even though the first order was disappointing.
b. An appliance distributor replaces a dishwasher free of charge and provides excellent after-sales service.
c. A needle on the gas gauge signals a driver to pull into a gas station.
d. The smell of hot dogs at a ballpark induces an obese man to order "a dog with everything on it."
Answer: B