Task: Question Answering
Input (English): Problem: evaluate 100 ^ 2 - 99 ^ 2 + 98 ^ 2 - 97 ^ 2 + 96 ^ 2 - 95 ^ 2 + . . . + 2 ^ 2 - 1 ^ 2 = ? 
Options: a ) 3043 , b ) 5050 , c ) 5176 , d ) 9356 , e ) 4890
Output (English): b