Task: Question Answering
Input (English): Question: Before 7 years, dog A’s age was 4 times of dog B’s age and after 4 years, dog A’s age will be 3 times of dog B’s age. What is the difference of dog A’s age and dog B’s now?

 Option A: 36

 Option B: 42

 Option C: 54

 Option D: 60

 Option E: 70
Output (English): Option E