Task: Question Answering
Input (English): Question: The T train leaves station A moving at a constant speed, and passes by stations B and C, in this order. It takes the T train 7 hours to reach station B, and 5 additional hours to reach station C. The distance between stations A and B is m kilometers longer than the distance between stations B and C. What is the distance between stations A and C in terms of m?

 Option A: 1.8m

 Option B: 6m

 Option C: 7m

 Option D: 9m

 Option E: 12m
Output (English): Option B