Task: Question Answering
Input (English): Question: In covering a distance of 36 km, A takes 2 hours more than B. If A doubles his speed, then he would take 1 hour less than B. A's speed is:

 Option A: 5 km/h

 Option B: 6 km/h

 Option C: 10 km/h

 Option D: 15 km/h

 Option E: 25 km/h
Output (English): Option B