Task: Question Answering
Input (English): Problem: a can do a piece of work in 3 hours ; b and c together can do it in 2 hours , which a and b together can do it in 2 hours . how long will c alone take to do it ? 
Options: a ) 2 hours , b ) 5 hours , c ) 6 hours , d ) 4 hours , e ) 3 hours
Output (English): e