Task: Question Answering
Input (English): Question: The bus that travels from St. Louis to Chicago and back comes to St. Louis every 3 hours while the bus that travels from St. Louis to Springfield and back comes to St. Louis every 4 hours. If at 6:00 o'clock both bused arrived at St. Louis, at what time will they meet in St. Louis again?

 Option A: 16:00.

 Option B: 18:00.

 Option C: 20:00.

 Option D: 22:00.

 Option E: 24:00.
Output (English): Option B