GAUSS7 2017 Problem 21

Rectangles that measure 4\times2 are positioned in a pattern in which the top left vertex of each rectangle (after the top one) is placed at the midpoint of the bottom edge of the rectangle above it, as shown. When a total of ten rectangles are arranged in this pattern, what is the perimeter of the figure?

Image

Answer Choices
A. 48
B. 64
C. 90
D. 84
E. 100