Which of the following is TRUE?

a$.$ Future contracts are over$-$the$-$counter contracts and thus, they have lower counterparty risks.

b$.$ A Japanese company having accounts receivable of foreign currency $($USD$)$ can hedge the currency risk by buying USD future contracts.

c$.$ A call option with a strike price of $($AUD $1\mathrm{.}50/$USD$)$ is in$-$the$-$money when the spot price is $($AUD $1\mathrm{.}60/$USD$).$

d$.$ Different from future contracts, forward contracts can be easily traded on the secondary market.