单选题：Given a binary search tree with its postorder traversal sequence

Given a binary search tree with its postorder traversal sequence { 2, 7, 15, 10, 20, 19, 35, 21, 18 }. If 18 is deleted from the tree, which one of the following statements is FALSE?

@[B](3)

A. One possible preprder traversal sequence of the resulting tree may be { 15, 10, 7, 2, 21, 19, 20, 35 }

B. One possible preprder traversal sequence of the resulting tree may be { 20, 10, 7, 2, 15, 21, 19, 35 }
C. One possible preprder traversal sequence of the resulting tree may be { 19, 10, 7, 2, 15, 21, 20, 35 }

D. It is possible that the resulting tree may have 3 leaves




A.One possible preprder traversal sequence of the resulting tree may be { 15, 10, 7, 2, 21, 19, 20, 35 }

B.One possible preprder traversal sequence of the resulting tree may be { 20, 10, 7, 2, 15, 21, 19, 35 }
C.One possible preprder traversal sequence of the resulting tree may be { 19, 10, 7, 2, 15, 21, 20, 35 }

D.It is possible that the resulting tree may have 3 leaves



答案：B