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

Problem: the length of each side of square a is increased by 100 percent to make square b . if the length of the side of square b is increased by 80 percent to make square c , by what percent is the area of square c greater than the sum of the areas of squares a and b ? 
Options: a ) 75 % , b ) 80 % , c ) 100 % , d ) 150 % , e ) 159.2 %
e

Problem: if the side length of square b is sqrt ( 3 ) times that of square a , the area of square b is how many times the area of square a ? 
Options: ['a ) 9', 'b ) 6', 'c ) 4', 'd ) 3', 'e ) 2']
d

Problem: find the area of the quadrilateral of one of its diagonals is 50 cm and its off sets 10 cm and 8 cm ? 
Options: a ) 189 cm 2 , b ) 150 cm 2 , c ) 127 cm 2 , d ) 450 cm 2 , e ) 187 cm 2

d