Task: Question Answering
Input (English): For all positive integers r and q, where \(r > q\), let the operation \& be defined by \(r \& q = \frac{3^{r + q}}{3^{r - q}}\). for how many positive integers r is r \& 1 equal to 9?
(A)0 (B)1 (C)2 (D)4 (E)More than 4
Output (English): E