Task: Question Answering
Input (English): Problem: for any positive integer n , the sum of the first n positive integers equals n ( n + 1 ) / 2 . what is the sum of all the even integers between 1 and 100 ? 
Options: a ) 1250 , b ) 1530 , c ) 2120 , d ) 2540 , e ) 2550
Output (English): e