The Following Question Are Based on the Following Diagram Illustrating

Multiple Choice

The following question are based on the following diagram illustrating the weekly average and marginal products for salespersons in the appliance department of a large department store:

-If the number of salespersons were increased from four to five,the number of appliances sold per week would

A) increase.
B) decrease.
C) remain unchanged.
D) decrease at first and then increase.
E) most likely change but how is uncertain.