Lance Is a Door-To-Door Insurance Salesman

Multiple Choice

Lance is a door-to-door insurance salesman.Lance finds it difficult 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