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