Task: Question Answering
Input (English): Question: 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 99 and 171?

 Option A: 4420

 Option B: 4860

 Option C: 5250

 Option D: 5780

 Option E: 6340
Output (English): Option B