For how many integers n is 1^n+1 = (n+1)^1?  Choose the most appropriate option.
A) 0	B) 1	C) 2	D) 3	E) None of these
If n=0   1^0+1 = (0+1)^1   1^1 =1 ok   If n=1   1^2 =1 ; (2)^1=2 not OK   So, 0nswer : 0
<result>A</result>
For how many integers n is 1^n+1 = (n+1)^1?