For exchange-traded options, since the stock exchange has the responsibility of ensuring that both the legs of the transaction are complete, the exchange would insist that the writer of the option

a. Deposit the total value of the contract amount as collateral

b. Pay a percentage value of the contract amount as premium

c. Deposit a percentage value of the contract amount as margin

d. Pay a percentage value of the brokerage amount as premium

e. Receive the margin amount from the counterparty