Task: Question Answering
Input (English): Problem: a contract is to be completed in 46 days sad 117 men were said to work 8 hours a day . after 33 days , ( 4 / 7 ) of the work is completed . how many additional men may be employed so that the work may be completed in time , each man now working 9 hours a day ? 
Options: a ) 91 , b ) 87 , c ) 85 , d ) 81 , e ) none of them
Output (English): d