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: the area of an isosceles trapezoid with sides of length 5 and bases of length 9 and 15 is ? 
Options: a ) 44 , b ) 48 , c ) 46 , d ) 47 , e ) 50
Example Output: b

Example Input: Problem: the perimeter of an isosceles right triangle is 10 + 10 sq rt 2 . what is the length of the hypotenuse of the triangle ? 
Options: a ) 5 , b ) 6 , c ) 7.07 , d ) 8 , e ) 9
Example Output: c

Example Input: Problem: a metallic sheet is of rectangular shape with dimensions 20 m x 25 m . from each of its corners , a square is cut off so as to make an open box . if the length of the square is 2 m , the volume of the box ( in m cube ) is : 
Options: a ) 4120 m cube , b ) 4140 m cube , c ) 5140 m cube , d ) 1344 m cube , e ) none of these
Example Output:
d