Under Part a of Medicare,how Is Reimbursement for Inpatient Hospital

Under Part A of Medicare,how is reimbursement for inpatient hospital care determined?

A) The amount billed to Medicare by the hospital is the amount Medicare pays.
B) Eighty percent of the hospital's regular charge for care is paid.
C) The hospital's usual,reasonable,and customary charge is paid.
D) Hospital care is classified into diagnosis-related groups (DRGs) and the amount reimbursed depends on the DRG classification of the care delivered.