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: huey ' s hip pizza sells two sizes of square pizzas : a small pizza that measures 8 inches on a side and costs $ 10 , and a large pizza that measures 12 inches on a side and costs $ 20 . if two friends go to huey ' s with $ 30 apiece , how many more square inches of pizza can they buy if they pool their money than if they each purchase pizza alone ? 
Options: a ) 5 square inches , b ) 10 square inches , c ) 16 square inches , d ) 25 square inches , e ) 350 square inches
[A]: c


[Q]: Problem: if each edge of a cube is doubled , then its volume : 
Options: ['a ) becomes 8 times', 'b ) becomes 9 times', 'c ) is double', 'd ) becomes 6 times', 'e ) none']
[A]: a


[Q]: Problem: square a is inscribed in circle b . if the perimeter of a is 32 , what is the circumference of b ? 
Options: ['a ) 6 √ 2 π', 'b ) 4 √ 2 π', 'c ) 8 √ 2 π', 'd ) 7 √ 2 π', 'e ) 5']
[A]:
c