单选题：____ present a uniform device-access interface to the I/O subsys

____ 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.@[B](1)
A. Kernel
B. Device drivers
C. Bus
D. Operating system





A.Kernel
B.Device drivers
C.Bus
D.Operating system


答案：B