Final answer:
Demand deposits make up most of the noncurrency cash which is available immediately.
Step-by-step explanation:
The answer to the question is D. Demand deposits make up most of the noncurrency cash which is available immediately. Demand deposits are the amounts held in checking accounts, and they are called demand deposits because the banking institution must give the deposit holder his money 'on demand' when the customer writes a check or uses a debit card.