The _________ present a uniform device-access interface to the I/O subsystem, much as system calls provide a standard interface between the application and the operating system.

The _________ present a uniform device-access interface to the I/O sub

1.	The _________ present a uniform device-access interface to the I/O subsystem, much as system calls provide a standard interface between the application and the operating system.
A.	Devices
B.	Buses
C.	Device drivers
D.	I/O systems
Answer» D. I/O systems