Different paths

Grid lines are drawn on three faces of a rectangular prism, as shown. A squirrel walks from P to Q along the edges and grid lines in such a way that she is always getting closer to Q and farther away from P. How many different paths from P to Q can the squirrel take?

\textbf{(A) }14 \qquad

\textbf{(B) }10 \qquad

\textbf{(C) }20 \qquad

\textbf{(D) }12 \qquad

\textbf{(E) }16 \qquad