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

Example Input: Problem: how many squares are there between 2011 to 2300 ? ? ? ? 
Options: ['a ) 3', 'b ) 4', 'c ) 5', 'd ) 6', 'e ) 7']
Example Output: a

Example Input: Problem: if the area of a circle is 16 pi square feet , find its circumference . 
Options: a ) 8 pi feet , b ) 28 pi feet , c ) 38 pi feet , d ) 48 pi feet , e ) 58 pi feet
Example Output: a

Example Input: Problem: if the radius of a cylinder is doubled and so is the height , what is the new volume of the cylinder divided by the old one ? 
Options: ['a ) 8 .', 'b ) 2', 'c ) 6', 'd ) 4', 'e ) 10']
Example Output:
a