Task: Question Answering
Input (English): Problem: don and his wife each receive an 8 percent annual raise . if don receives a raise rs . 800 and his wife receives a raise of rs . 840 , what is the difference between their annual income after their raises ? 
Options: a ) 40 , b ) 460 , c ) 500 , d ) 540 , e ) 150
Output (English): d