A garbage truck must pick up garbage at 4 different dump sites (A, B, C, and D) as shown in the graph below, starting and ending at A. The numbers on the edges represent distances (in miles) between locations. The truck driver wants to minimize the total length of the trip.
The cheapest-link tour starting with vertex A is given by:
A. A, D, C, B, A.
B. A, B, C, D, A.
C. A, B, D, C, A.
D. A, C, B, D, A.
E. none of these
Answer: D
Mathematics
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