Task: Question Answering
Input (English): Problem: a and b can do a piece of work in 6 days , b and c in 8 days , c and a in 12 days . how long will c take to do it ? 
Options: a ) 48 days , b ) 55 days , c ) 24 days , d ) 33 days , e ) 40 days
Output (English): a