Task: Question Answering
Input (English): Problem: karen places a bet with tom that she will beat tom in a car race by 4 miles even if karen starts 4 minutes late . assuming that karen drives at an average speed of 60 mph and tom drives at an average speed of 45 mph , how many h miles will tom drive before karen wins the bet ? 
Options: a ) 15 , b ) 18 , c ) 21 , d ) 24 , e ) 27
Output (English): d