Task: Question Answering
Input (English): Problem: the ratio of the present age of sandy to that of molly is 7 : 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 ) 24 , c ) 30 , d ) 36 , e ) 42
Output (English): d