If (1+f)g=g, which of the following must be true?  Choose the correct choice from the following.
A) f=-1 or g=0
B) f=0 or g=0
C) f=1 or g=1
D) f=-1 or g=-1
E) f=0 or g=1
By only having fg=0, we cannot say answer is B as A and E options also satisfy the condition fg=0. ans f=0 or g=0
<result>B</result>
If (1+f)g=g, which of the following must be true?