The height of 2-3 tree with n elements is ______

The correct answer D. between log3(n + 1) and log2(n + 1)

The number of elements in a 2-3 tree with height h is between 2h – 1 and 3h – 1. Therefore, the 2-3 tree with n elements will have the height between log3(n + 1) and log2(n + 1).