Task: Question Answering
Input (English): Problem: in a garment industry , 12 men working 9 hours per day complete a piece of work in 10 days . to complete the same work in 12 days , working 15 hours a day , the number of men required is : 
Options: a ) 4 , b ) 5 , c ) 6 , d ) 7 , e ) 9
Output (English): d