Task: Question Answering
Input (English): Problem: without stoppages , a train travels certain distance with an average speed of 80 km / h , and with stoppages , it covers the same distance with an average speed of 60 km / h . how many minutes per hour the train stops ? 
Options: a ) 15 , b ) 18 , c ) 10 , d ) 16 , e ) none of these
Output (English): a