Which of the following are differences between a currency futures contract and a forward contract?

a$.$

The futures contract is marked to market daily whereas the forward contract is only due to be settled at maturity.

b$.$

The counterparty to the futures participant is unknown with the clearinghouse stepping into each transaction whereas the forward contract participants are in direct contact setting the forward specifications.

c$.$

A single sales commission covers both the purchase and sale of a futures contract whereas there is no specific sales commission with a forward contract because banks earn a profit through the bid$-$ask spread.

d$.$

All of the above are true.