It usually takes less time to buy a six-pack of Pepsi, a loaf of bread, and a bag of potato chips at a small convenience store (such as 7-Eleven) than at a large, full-service grocery store. Which of the following persons is most likely to buy these items at a convenience store?

a. a person who is out of work 70.
b. a person with a high opportunity cost of time 71
c. a person with a low opportunity cost of time 72
d. a person who works at a full-service grocery store