Task: Question Answering
Input (English): Problem: if ryan and smith car ratio is 5: 8. ryan bought 6 new car and smith bought 2 new car. now, smith has 18 car. what is their car ratio now ?
Options: a. 5: 4, b. 3: 2, c. 8: 9, d. 6: 5, e. 7: 5
Output (English): c