If$,$ Wilmar International Limited, a Singapore firm, desires to avoid the risk from exchange rate fluctuations, and it will receive IDR$90,000,000($IDR stands for Indonesian rupiah, currency of Indonesia$)$ in $150$ days from its business client in Indonesia, Wilmar International Limited could:

Question $15$ options:

sell Indonesian rupiah when it's due at the spot market with the spot rate.

obtain a $150-$day forward sale contract on Indonesian rupiah $($i$.$e$.,$ sell a $150-$day forward contract on Indonesian rupiah$).$

obtain a $150-$day forward purchase contract on Indonesian rupiah $($i$.$e$.,$ buy a $150-$day forward contract on Indonesian rupiah$).$

purchase a $150-$day call options on Indonesian rupiah.