The area of trapezoid A B C D is 164 \mathrm{~cm}^{2}. The altitude is 8 \mathrm{~cm}, A B is 10 \mathrm{~cm}, and C D is 17 \mathrm{~cm}. What is B C, in centimeters?
Answer Choices
A. 9
B. 10
C. 12
D. 15
E. 20
Answer Choices
A. 9
B. 10
C. 12
D. 15
E. 20