Use the Following Scenario to Answer the Following Questions

Multiple Choice

Use the following scenario to answer the following questions:
Rosa and Dirk produce basketballs and footballs.Rosa can produce six basketballs per hour or two footballs per hour.Dirk can produce three basketballs per hour or four footballs per hour.
-Based on the scenario,Rosa's opportunity cost of one basketball is ________ football(s) .

A) one-third of a
B) one
C) six
D) four
E) eight