A Grand Tour of Four Cities Begins at City a and Makes

A grand tour of four cities begins at city A and makes successive stops at cities B, C, and D before returning to city A. If the cities are located as shown in the following figure, find the total distance covered on the tour. ​
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A) 2,300 mi
B) 2,200 mi
C) 2,100 mi
D) 2,000 mi
E) 1,600 mi