Task: Question Answering
Input (English): Problem: david and andrew can finish the work 12 days if they work together . they worked together for 8 days and then andrew left . david finished the remaining work in another 8 days . in how many days david alone can finish the work ? 
Options: a ) 30 days , b ) 60 days , c ) 70 days , d ) 80 days , e ) 24 days
Output (English): e