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. `83 67 91 98 20 75`
B. `83 67 75 91 20 98`
C. `83 91 75 67 20 98`
D. `83 91 98 67 75 20`





A.`83 67 91 98 20 75`
B.`83 67 75 91 20 98`
C.`83 91 75 67 20 98`
D.`83 91 98 67 75 20`


答案：C