Quiz
Question 1 of 4. 0 correct, 0 incorrect.
A tree's root is A. A's left child is B and its right child is C. B's left child is D, and no other node has children. The in-order sequence is ____ (letters separated by spaces).
Hint
In-order finishes a node's whole left subtree before visiting the node. Where does the left subtree of B start?