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

Ex Input:
Problem: a picture is copied onto a sheet of paper 8.5 inches by 10 inches . a 1.5 inch margin is left all around . what area in square inches does the picture cover ?
Options: ['a ) 76', 'b ) 65', 'c ) 59.5', 'd ) 49', 'e ) 38.5']

Ex Output:
e

Ex Input:
Problem: what is the radius of the incircle of the triangle whose sides measure 5 , 12 and 13 units ?
Options: ['a ) 2 units', 'b ) 12 units', 'c ) 6.5 units', 'd ) 6 units', 'e ) 7.5 units']

Ex Output:
a

Ex Input:
Problem: a cubical block of metal weighs 8 pounds . how much will another cube of the same metal weigh if its sides are twice as long ?
Options: a ) 48 , b ) 32 , c ) 24 , d ) 18 , e ) 64

Ex Output:
e