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 pieces can a square pizza be cut into by making 6 linear cuts ? 
Options: a ) 20 , b ) 21 , c ) 22 , d ) 23 , e ) 24
Example Output: c

Example Input: Problem: how many 4 x 5 x 8 cubes could fit in a 10 x 16 x 84 box ? 
Options: a ) 84 , b ) 90 , c ) 85 , d ) 77 , e ) 64
Example Output: a

Example Input: Problem: in a certain circle there are 10 points . what is the number of the triangles connecting 2 points of the 10 points ? 
Options: a ) 40 , b ) 45 , c ) 108 , d ) 120 , e ) 132
Example Output:
b