Ed O'Brien Has Both Medicare Part a and Part B

Ed O'Brien has both Medicare Part A and Part B coverage. He also has coverage under a PBM plan that uses a closed formulary to manage the cost and use of pharmaceuticals. Recently, Mr. O'Brien was hospitalized for an aneurysm. Later, he was transferred by:

A) Confinement in the extended-care facility after his hospitalization.
B) Transportation by ambulance from the hospital to the extended-care facility.
C) Physicians' professional services while he was hospitalized.
D) physicians' professional services while he was at the extended-care facility.