A delivery truck must deliver packages to 6 different store locations (A, B, C, D, E, and F). The trip must start and end at A. The graph below shows the distances (in miles) between locations. The driver wants to minimize the total distance traveled:
Which of the following gives the nearest-neighbor tour starting with vertex A?
A. A, D, F, E, C, B, A
B. A, C, D, B, E, F, A
C. A, B, C, D, E, F, A
D. A, E, F, C, B, D, A
E. none of these