Task: Question Answering
Input (English): Problem: a contractor undertakes to do a job within 100 days and hires 10 people to do it . after 20 days , he realizes that one fourth of the work is done so he fires 2 people . in how many more days m will the work get over ? 
Options: a ) 60 , b ) 70 , c ) m = 75 , d ) 80 , e ) 100
Output (English): c