Task: Question Answering
Input (English): Problem: nicky and cristina are running a 400 meter race . since cristina is faster than nicky , she gives him a 12 second head start . if cristina runs at a pace of 5 meters per second and nicky runs at a pace of only 3 meters per second , how many seconds will nicky have run before cristina catches up to him ? 
Options: a ) 40 , b ) 25 , c ) 35 , d ) 30 , e ) 50
Output (English): d