If n is an even integer, which of the following must also be an even integer? Select:	A) n^2 + 1^2	B) (n+1)^2	C) n + 1	D) 3n + 1	E) n^2 + 1
Answer: (n+1)^2   A: 2n = odd   (n+1)^2: -2n + 1 = even   C: -(n^2) = odd   D: 2n - 1 = odd   E: n^3 = odd   Answer: (n+1)^2
<result>B</result>
If n is an even integer, which of the following must also be an even integer?