Task: Question Answering
Input (English): Problem: the average ( arithmetic mean ) of 4 positive integers is 30 . if the average of 2 of these integers is 15 , what is the greatest possible value that one of the other 2 integers can have ? 
Options: a ) 55 , b ) 89 , c ) 100 , d ) 109 , e ) 115
Output (English): b