In rectangle A B C D, A B=20 and B C=10. Let E be a point on \overline{C D} such that \angle C B E=15^{\circ}. What is A E ?

**Answer Choices**

A. \dfrac{20 \sqrt{3}}{3}

B. 10 \sqrt{3}

C. 18

D. 11 \sqrt{3}

E. 20

In rectangle A B C D, A B=20 and B C=10. Let E be a point on \overline{C D} such that \angle C B E=15^{\circ}. What is A E ?

**Answer Choices**

A. \dfrac{20 \sqrt{3}}{3}

B. 10 \sqrt{3}

C. 18

D. 11 \sqrt{3}

E. 20