In CE approximation, the upper end of d.c. load line is called the __________ point and the lower end is the __________ point.

In CE approximation, the upper end of d.c. load line is called the ___

1.	In CE approximation, the upper end of d.c. load line is called the __________ point and the lower end is the __________ point.
A.	Q, base
B.	base, Q
C.	saturation, cut off
D.	cut off, saturation
Answer» D. cut off, saturation