AMC 8 1989 Problem 23

An artist has $14$ cubes, each with an edge of $1$ meter. She stands them on the ground to form a sculpture as shown. She then paints the exposed surface of the sculpture. How many square meters does she paint? $\text{(A)}\ 21 \text{(B)}\ 24 \text{(C)}\ 33 \text{(D)}\ 37 \text{(E)}\ 42$