Task: Question Answering
Input (English): Problem: the ratio of the present age of sandy to that of molly is 9: 2. eight years from now, the ratio of the ages of sandy to molly will be 5: 2. what was sandy ' s age 6 years ago ?
Options: a. 18, b. 21, c. 24, d. 27, e. 30
Output (English): b