Figure: the Market for Round-Trip Airline Flights

Figure: The Market for Round-Trip Airline Flights
(Figure: The Market for Round-Trip Airline Flights) Look at the figure The Market for
Round-Trip Airline Flights.The supply and demand graph represents the market for round-trip airline flights between Boston and New York.Suppose the mayor of New York decides to limit the number of flights to Q₁ to reduce air pollution.What area or areas represent producer surplus after the quota is in place?
A.A
B.a + b + c
C.c + e
D.b + d + f