Task: Question Answering
Input (English): Question: In the following sequence: [x, y, z, 5, 7, 16, 28] each number is equal to the sum of the three numbers preceding it. What is x-y?

 Option A: 6

 Option B: 3

 Option C: 4

 Option D: 5

 Option E: 7
Output (English): Option D