Task: Question Answering
Input (English): Problem: ifaequals the sum of the even integers from 2 to 80 , inclusive , andbequals the sum of the odd integers from 1 to 79 , inclusive , what is the value of a - b ? 
Options: a ) 1 , b ) 10 , c ) 19 , d ) 40 , e ) 21
Output (English): d