Task: Question Answering
Input (English): Problem: each of the positive integers a and c is a 4 - digit integer . if each of the digits 0 through 9 appears in one of these 3 integers , what is the maximum possible value of the sum of a and c ? 
Options: a ) 18695 , b ) 18325 , c ) 18365 , d ) 18395 , e ) 18485
Output (English): d