Penelope folds a piece of paper in half, creating two layers of paper. She folds the paper in half again, creating a total of four layers of paper. If she continues to fold the paper in half, which of the following is a possible number of layers that could be obtained?
(A) 10
(B) 12
(C) 14
(D) 16
(E) 18
When Penelope folds the paper in half, the number of layers doubles.

Starting with 4 layers of paper, then after the next three folds, there are 8 and then 16 and then 32 layers of paper. Additional folds create more layers.

Of the given choices (which are all less than 32), only 16 is a possible number of layers.

ANSWER: (D)