An expression \(f = \overline {\overline {AB} + \overline {A} + AB} \) can be reduced to

An expression \(f = \overline {\overline {AB} + \overline {A} + AB} \

1.	An expression \(f = \overline {\overline {AB} + \overline {A} + AB} \) can be reduced to
A.	A
B.	B
C.	0
D.	1
Answer» D. 1