单选题:Given a binary search tree as shown below, which one of the foll
Given a binary search tree as shown below, which one of the following insertion orders is valid?

A.11 12 13 14 15
B.12 15 11 14 13
C.11 15 12 14 13
D.11 15 13 14 12
答案:C

A.11 12 13 14 15
B.12 15 11 14 13
C.11 15 12 14 13
D.11 15 13 14 12
答案:C