Task: Question Answering
Input (English): Question: In a theater, the first row has 14 seats and each row has 3 more seats than previous row. If the last row has 50 seats, what is the total number of seats in the theater?

 Option A: 404

 Option B: 408

 Option C: 412

 Option D: 416

 Option E: 420
Output (English): Option D