Why Are Credit Cards Excluded from the Measure of the Nation's

Why are credit cards excluded from the measure of the nation's money supply?

A) Because debt continues to accrue as the credit card is used
B) Because money is not moved until the debt is paid
C) Because there are few spending controls on credit cards
D) Because credit cards represent a convenience, not a service
E) Because only the interest paid on the credit card is considered liquid money