Task: Question Answering
Input (English): Problem: a man , a woman and a boy can together complete a piece of work in 3 days . if a man alone can do it in 6 days and a women alone in 18 days , how long will a boy take to complete the work ? 
Options: a ) 6 days , b ) 8 days , c ) 9 days , d ) 7 days , e ) 5 days
Output (English): c