Task: Question Answering
Input (English): Question: One hour after Yolanda started walking from X to Y, a distance of 52 miles, Bob started walking along the same road from Y to X. If Yolanda's walking rate was 3 miles per hour and Bobт's was 4 miles per hour, how many miles had Bob walked when they met?

 Option A: 28

 Option B: 23

 Option C: 22

 Option D: 21

 Option E: 19.5
Output (English): Option A