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For the digraph shown, which of the following is a valid topological sort?

161
5%
8
1, 2, 3, 4, 5, 6, 7, 8
91%
146
1, 2, 5, 4, 7, 8, 3, 6
3%
5
2, 1, 4, 5, 3, 8, 7, 6
0%
0
1, 3, 6, 7
1%
2
none
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