Task: Question Answering
Input (English): Question: If k > 0, x + k = y, and y + 5k = z, what is the ratio between z - x and y - x ?

 Option A: 2 to 1

 Option B: 3 to 1

 Option C: 4 to 1

 Option D: 5 to 1

 Option E: 6 to 1
Output (English): Option E