Lance Is a Door-To-Door Insurance Salesman

Multiple Choice

Lance is a door-to-door insurance salesman. Lance finds it hard to predict what his sales will be for any given day. On some days, he sells one policy for every three houses that he visits; on other days, he may sell one policy every twenty houses. Lance is being rewarded on a __________ reinforcement schedule.

A) fixed-ratio
B) fixed-interval
C) variable-ratio
D) variable-interval