Task: Question Answering
Input (English): Question: If the positive integer N is a perfect square, which of the following must be true?
I. The number of distinct factors of N is odd.
II. The sum of the factors of N is odd.
III. The number of distinct prime factors of N is even.

 Option A: I only

 Option B: II only

 Option C: I and II

 Option D: I and III

 Option E: I, II and III
Output (English): Option C