Use the Following Scenario to Answer the Questions That Follow

Use the following scenario to answer the questions that follow.
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,Dirk's opportunity cost of one football is ________ basketball(s) .

A) 3/4
B) 1 1/3
C) 3
D) 4
E) 6