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