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

[Q]: Problem: if the radius of a circle is increased by 40 % then the area is increased by : 
Options: a ) 44 % , b ) 120 % , c ) 96 % , d ) 40 % , e ) none of the above
[A]: c


[Q]: Problem: the diagonals of a rhombus are 10 cm and 12 cm . find its area ? 
Options: a ) 158 , b ) 60 , c ) 150 , d ) 123 , e ) 117
[A]: b


[Q]: Problem: if the diameter of circle r is 80 % of the diameter of circle s , the area of circle r is what percent of the area of circle s ? 
Options: a ) 74 % , b ) 64 % , c ) 84 % , d ) 94 % , e ) 34 %
[A]:
b