GAUSS8 2011 Problem 15

Past Contests GAUSS8 GAUSS (GR. 8) - 2011
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In the diagram, AE and BD are straight lines that intersect at C. If BD=16,AB=9,CE=5, and DE=3, then the length of AC is

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Answer Choices
A. 11
B. 12
C. 15
D. 17
E. 16