Task: Question Answering
Input (English): Problem: a piece of work can finish by a certain number of men in 100 days . if however , there were 10 men less , it would take 10 days more for the work to be finished . how many men were there originally ? 
Options: a ) 75 , b ) 82 , c ) 100 , d ) 110 , e ) 120
Output (English): d