Which of the following statements on futures contracts is incorrect?

A. All futures contracts require physical deliveries of the underlying assets.

B. All futures contracts are marked to market on daily basis. This means that the contract holders accounts are credited/debited for daily gains/losses.

C. Futures contracts trading on exchanges are standardized contracts that are identical in terms of maturity, quantity/quality of underlying assets, and daily price movements allowed.

D. Stock index futures trade with a multiplier to provide leverage.