单选题：Which one of the following is a possible postorder traversal seq

Which one of the following is a possible postorder traversal sequence of a binary search tree? @[C](3)

A. `3 1 6 2 5 8 10 9 7 4`
B. `3 1 2 6 5 8 10 9 7 4`
C. `1 3 2 6 5 8 10 9 7 4`
D. `1 3 2 6 8 5 10 9 7 4`




A.`3 1 6 2 5 8 10 9 7 4`
B.`3 1 2 6 5 8 10 9 7 4`
C.`1 3 2 6 5 8 10 9 7 4`
D.`1 3 2 6 8 5 10 9 7 4`


答案：C