Which of the following is(are) true

I) Both forward and futures contracts are marking-to-market.

II) Futures contracts are traded on exchanges, but forwards contracts usually are not.

III) Forward contracts may have considerable counterparty risks while futures contracts have little counterparty risk

IV) Futures contracts generally require investors to maintain margin accounts

Group of answer choices

I and II only

I and III only

II and III only

II, III and IV only