Task: Question Answering
Input (English): Problem: before 6 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 ?
Options: a. 36, b. 42, c. 54, d. 60, e. 64
Output (English): e