In the Absence of Government Interference, There Is a Constant

in the absence of government interference, there is a constant marginal cost of $5 per ounce for growing marijuana and delivering it to buyers.If the probability that any shipment of marijuana seized is .50 and the fine if a shipper caught is $40 per ounce, then the equilibrium price of marijuana per ounce is

A) $50.
B) $45.
C) $2.50.
D) $25.
E) $7.50.