In the diagram, A B C F is a rectangle with A B=30 \mathrm{~cm} and A F=14 \mathrm{~cm}. Points E and D are on F C so that F E=5 \mathrm{~cm} and the area of quadrilateral A B D E is 266 \mathrm{~cm}^{2}. The length of D C is
Answer Choices
A. 17 \mathrm{~cm}
B. 16 \mathrm{~cm}
C. 19 \mathrm{~cm}
D. 20 \mathrm{~cm}
E. 18 \mathrm{~cm}