The spot price of gasoline is USD 0.60/gal. The cost of financing for the purchase of the contract is USD 0.20/gal per month; the cost of storage for the physical commodity is USD 0.15/gal per month. The price for a 1-month gasoline futures contract is USD 0.73/gal. In this scenario, what would be the best strategy to set up a profitable/ riskless spot/futures arbitrage trade?

a. Buy spot gasoline at USD 0.60/gal and simultaneously sell an equal number of futures contracts units at USD 0.73/gal.

b. Sell spot gasoline at USD 0.60/gal and simultaneously buy an equal number of futures contracts units at USD 0.73/gal.

c. Buy spot gasoline at USD 0.60/gal, store it for one month and then sell it on the spot market.

d. Do nothing; no strategy would result in a riskless profit.