As shown in the figure, Xiaoming designed two right angles to measure the width of the river BC, he measured AB = 2.0, BD = frac {7.0}{3.0}, CE = 9.0, then the width of the river BC is ()
Choices:
A:\frac{7}{2}米
B:\frac{17}{2}米
C:\frac{40}{7}米
D:11米
Please directly answer the question and provide the correct option letter, e.g., A, B, C, D.
Question: As shown in the figure, Xiaoming designed two right angles to measure the width of the river BC, he measured AB = 2.0, BD = frac {7.0}{3.0}, CE = 9.0, then the width of the river BC is ()
Choices:
A:\frac{7}{2}米
B:\frac{17}{2}米
C:\frac{40}{7}米
D:11米
Please first conduct reasoning, and then answer the question and provide the correct option letter, e.g., A, B, C, D, at the end.
Question: As shown in the figure, Xiaoming designed two right angles to measure the width of the river BC, he measured AB = 2.0, BD = frac {7.0}{3.0}, CE = 9.0, then the width of the river BC is ()
Choices:
A:\frac{7}{2}米
B:\frac{17}{2}米
C:\frac{40}{7}米
D:11米