Task: Question Answering
Input (English): Question: How many different pairs of numbers (s, t) such that s = 3t can be obtained if s and t are selected from the set of number {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}

 Option A: 1

 Option B: 2

 Option C: 3

 Option D: 4

 Option E: 5
Output (English): Option D