Let \(FI(x)\) be defined as the sum of the digits of the positive integer \(x\). For example, \(FI(7) = 7\) and \(FI(123) = 6\). For how many two-digit values of \(x\) does \(FI(FI(x)) = 2\) ?
(A)8 (B)9 (C)10 (D)12 (E)13
C