Which tree traversal visits the root first, then the left subtree, then the right subtree?

• A. Pre-order visits root, then left subtree, then right subtree.
• B. In-order visits left subtree, then root, then right subtree.
• C. Post-order visits left subtree, then right subtree, then root.
• D. Level-order visits root, then its children.

Answer: (A)