1.

For the tree below, write the post-order traversal.

A. 2, 7, 2, 6, 5, 11, 5, 9, 4
B. 2, 7, 5, 2, 6, 9, 5, 11, 4
C. 2, 5, 11, 6, 7, 4, 9, 5, 2
D. 2, 7, 5, 6, 11, 2, 5, 4, 9
Answer» D. 2, 7, 5, 6, 11, 2, 5, 4, 9


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