Final answer:
Hedging is a financial transaction used to protect against currency risks. Buying Japanese Yen Calls can serve as an equivalent hedge to protect against the risk of the Dollar falling against the Yen.
Step-by-step explanation:
Hedging is a financial transaction used to protect against currency risks. In this case, buying Japanese Yen Calls can serve as an equivalent hedge to protect against the risk of the Dollar falling against the Yen. If the Yen appreciates against the Dollar, the gain on the Yen Calls would offset any loss on the Dollars received in payment. Another option, not listed, would be to buy Dollar PUTS in order to hedge against the risk of the Dollar decreasing.