14. Figures 1 and 2 above show two stacks of identical pail and their heights. If n is the number of pails in the stack and n>1, the height of the stacks, in inches, is given by h(n)=2n+8. The number 2 in the equation represents what quantity shown in figure 3?
(A) a, the height of the pail
(B) b, the height of the overlap of two pails
(C) c, the distance between the top of one pail and the top of the next pail in the stack
(D) d, the diameter of the bottom of each pail
(E) e, the volume of the bottom pail that remains after the second pail is stacked on top of it Doc2
Could someone please explain this