How Do Single-Payer Health-Care Systems Keep Down the Costs of Care

How do single-payer health-care systems keep down the costs of care?

A) They are very efficient; only one payer needs to be billed by providers.
B) They are non-profit, motivated solely by the desire to provide health care.
C) As the only payer, the government can pressure providers to keep their costs down.
D) All of these are ways in which the single-payer systems reduce the cost of care.