In the complex plane, let A be the set of solutions to z^{3}-8=0 and let B be the set of solutions to z^{3}-8 z^{2}-8 z+64=0. What is the greatest distance between a point of A and a point of B ?
Answer Choices
A. 2 \sqrt{3}
B. 6
C. 9
D. 2 \sqrt{21}
E. 9+\sqrt{3}