26. Consider the AVL tree resulting from sequentially inserting the following numbers into an empty AVL tree: 40, 60, 55, 15, 20, 2, 25, 30. What is the sum of the numbers in the leaf nodes in the AVL tree?
(A) 90
(D) 160 for it.
(B) 130
(C) 155
(E)170

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統計： A(0), B(2), C(1), D(0), E(0) #2826221