Question: Looking at Figure 2, why are the values along the diagonal of the table zeroes? Select an answer and submit. For keyboard navigation, use the

Looking at Figure 2, why are the values along the diagonal of the table zeroes? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an a Because the distance from, say, Atlanta to Atlanta is zero miles. b Because symmetry is beautiful. c Because the authors are confused. \begin{tabular}{|c|c|c|c|c|c|c|c|c|c|c|} \hline & Atlanta & Chicaso & Denver & Houston & \begin{tabular}{l} Los \\ Angeles \end{tabular} & Miami & New York & \begin{tabular}{l} San \\ Francisco \end{tabular} & Seattle & \begin{tabular}{l} Washingto \\ D, D.C. \end{tabular} \\ \hline Atlanta & 0 & 587 & 1212 & 701 & 1936 & 604 & 748 & 2139 & 2182 & 543 \\ \hline Chicago & 587 & 0 & 920 & 940 & 1745 & 1188 & 713 & 1858 & 1737 & 597 \\ \hline Denver & 1212 & 920 & 0 & 879 & 831 & 1726 & 1631 & 949 & 1021 & 1494 \\ \hline Houston & 701 & 940 & 879 & 0 & 1374 & 968 & 1420 & 1645 & 1891 & 1220 \\ \hline Los Angeles & 1936 & 1745 & 831 & 1374 & 0 & 2339 & 2451 & 347 & 959 & 2300 \\ \hline Miami & 604 & 1188 & 1726 & 968 & 2339 & 0 & 1092 & 2594 & 2734 & 923 \\ \hline New York & 748 & 713 & 1631 & 1420 & 2451 & 1092 & 0 & 2594 & 2734 & 923 \\ \hline San Francisco & 2139 & 1858 & 949 & 1645 & 347 & 2594 & 2594 & 0 & 678 & 2442 \\ \hline Seattle & 2182 & 1737 & 1021 & 1891 & 959 & 2734 & 2734 & 678 & 0 & 2329 \\ \hline Washington, D.C. & 543 & 597 & 1494 & 1220 & 2300 & 923 & 923 & 2442 & 2329 & 9 \\ \hline \end{tabular} Figure 2: Flying distance between some U.S. cities
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