Answer properly
Insert the following keys, in the given order, into an initially empty 2-3 tree: D, S, A, R, E, F, U, N. After drawing its equivalent LLRB tree, what is the output of a postorder traversal on the LLRB tree?
A. None of the others
B. A, E, D, N, U, S, R, F
C. A, E, D, N, S, U, F, R
D. A, E, D, N, U, S, F, R
E. A, E, D, N, S, U, R, F