Count the total number of spheres in each box. The number in box A divided by the volume change in each part will give the number we are looking for and allow us to match boxes.
The number in each box is : A = 12 , B = 6, C = 4, and D = 3.
a ) When the volume is tripled, there should be 12/3 = 4 spheres in a box. This is box C .
b ) When the volume is doubled, there should be 12/2 = 6 spheres in a box. This is box B .
c) When the volume is quadrupled, there should be 12/4 = 3 spheres in a box. This is box D .