Task: Question Answering
Input (English): Problem: a can copy 50 papers in 10 hrs , while a & b can copy 70 papers in 10 hrs . how many hours are required for b to copy 26 papers ? 
Options: a ) 11 hours , b ) 12 hours , c ) 13 hours , d ) 14 hours , e ) 18 hours
Output (English): c