Cold Duck Airlines flies between Tacoma and Portland. The company leases planes on a year$-$long contract at a cost that averages $$600$ per flight. Other costs $($fuel$,$ flight attendants, etc.$)$ amount to $$550$ per flight. Currently, Cold Duck's revenues are $$1,000$ per flight. All prices and costs are expected to continue at their present levels. If it wants to maximize profit, Cold Duck Airlines should

a$.$ drop the flight now but renew the lease if conditions improve.

b$.$ continue flying until the lease expires and then drop the run.

c$.$ continue the flight.

d$.$ drop the flight immediately.