The one-way routes connecting towns A,M,C,X,YA, M, C, X, Y , and ZZ are shown in the figure below (not drawn to scale). The distances in kilometers along each route are marked. Traveling along these routes, what is the shortest distance from AA to ZZ in kilometers?
A. 28
B. 29
C. 30
D. 31
E. 32

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A. 28

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