单选题：Given the structure of a binary search tree (as shown in the fig

Given the structure of a binary search tree (as shown in the figure), which one of the following insertion sequences is impossible? @[C](3)


A. `85 56 89 95 18 75`
B. `85 56 75 89 18 95`
C. `85 89 75 56 18 95`
D. `85 89 95 56 75 18`




A.`85 56 89 95 18 75`
B.`85 56 75 89 18 95`
C.`85 89 75 56 18 95`
D.`85 89 95 56 75 18`


答案：C