Task: Question Answering
Input (English): Question: A shop sells bicycles and tricycles. In total there are 10 cycles (cycles include both bicycles and tricycles) and 21 wheels. Determine how many of each there are, if a bicycle has two wheels and a tricycle has three wheels.

 Option A: b=9,t=1

 Option B: b=7,t=3

 Option C: b=6,t=2

 Option D: b=2,t=5

 Option E: b=6,t=4
Output (English): Option A