Task: Question Answering
Input (English): If \(k\) is a positive integer, which of the following is equivalent to \(3^k + 3^k + 3^k\)?
(A)\(3^ { 3k } \) (B)\(3^ { k + 2 } \) (C)\(3^ { k + 1 } \) (D)\(9^ { 2k } \) (E)\(9^ { 3k } \)
Output (English): C