Task: Question Answering
Input (English): Question: Which one of the following is the sum of the numbers 1, 3, 5, 7, 9â€¦. up to nth number?

 Option A: N2 + 1

 Option B: N2 - 1

 Option C: N(N + 1

 Option D: N2

 Option E: N(N + 1
Output (English): Option D