AMC 10 2014b Problem 21

Trapezoid $ABCD$ has parallel sides $\overline{AB}$ of length $33$ and $\overline {CD}$ of length $21$. The other two sides are of lengths $10$ and $14$. The angles $A$ and $B$ are acute. What is the length of the shorter diagonal of $ABCD$? $\textbf{(A) }10\sqrt{6} \textbf{(B) }25 \textbf{(C) }8\sqrt{10} \textbf{(D) }18\sqrt{2} \textbf{(E) }26$