What type of memory is not directly addressable by the CPU and requires special softw3are called EMS (expanded memory specification)?

What type of memory is not directly addressable by the CPU and require

1.	What type of memory is not directly addressable by the CPU and requires special softw3are called EMS (expanded memory specification)?
A.	Extended
B.	Expanded
C.	Base
D.	Conventional
Answer» C. Base