To Create an Index Named RepBal with the Keys RepNum

To create an index named RepBal with the keys RepNum and Balance and with the balances listed in descending order, which command should you use?

A) CREATE INDEX RepBal ON Customer (RepNum, Balance) ;
B) CREATE INDEX RepBal Customer (RepNum DESC) ;
C) CREATE INDEX ON Customer (RepNum, Balance ASC) ;
D) CREATE INDEX RepBal ON Customer (RepNum, Balance DESC) ;