In this task, you need to answer the given multiple-choice question on the general math. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

Example Input: Problem: marcella has 27 pairs of shoes . if she loses 9 individual shoes , what is the greatest number of matching pairs she could have left ? 
Options: a ) 22 , b ) 20 , c ) 19 , d ) 16 , e ) 15
Example Output: a

Example Input: Problem: in august , a cricket team that played 120 matches won 26 % of the games it played . after a continuous winning streak , this team raised its average to 52 % . how many matches did the team win to attain this average ? 
Options: a ) 40 , b ) 52 , c ) 65 , d ) 80 , e ) 98
Example Output: c

Example Input: Problem: if 1488 / 1.24 = 1200 , then 148.8 / 12.4 is equal to ? 
Options: a ) 17 , b ) 10 , c ) 14 , d ) 12 , e ) 11
Example Output:
d