Task: Question Answering
Input (English): Problem: a man walking at a constant rate of 6 miles per hour is passed by a woman traveling in the same direction along the same path at a constant rate of 12 miles per hour . the woman stops to wait for the man 10 minutes after passing him , while the man continues to walk at his constant rate . how many minutes must the woman wait until the man catches up ? 
Options: a ) 5 , b ) 15 , c ) 10 , d ) 20 , e ) 25
Output (English): c