Task: Question Answering
Input (English): Problem: the number of timeshare condos available at sunset beach is 3 / 5 the number of timeshare condos available at playa del mar . if the total number of timeshare condos available at the two beaches combined is 400 , what is the difference between the number of condos available at sunset beach and the number of condos available at playa del mar ? 
Options: a ) 60 , b ) 90 , c ) 120 , d ) 100 , e ) 240
Output (English): d