\(x^2 + (k +1)x + 4 = (x + h)^2\) In the equation above, \(k\) and \(h\) are positive constants. If the equation is true for all values of \(x\), what is the value of \(k + h\)?
(A)3 (B)4 (C)5 (D)7 (E)9
C