The type of software that controls the internal operations in the computer and controls how the computer works with all its parts is which of the following? [RBI 2012]

The type of software that controls the internal operations in the comp

1.	The type of software that controls the internal operations in the computer and controls how the computer works with all its parts is which of the following? [RBI 2012]
A.	Shareware
B.	Public domain software
C.	Application software
D.	Operating system software
E.	None of these
Answer» E. None of these