Adding an element to an unbalanced binary search tree takes ____ time. A)O(n) B)O(1) C)O(log (n)) D)O(n²)

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Adding an element to an unbalanced binary search tree can take O(n) time in the worst case, where n is the number of nodes in the tree. This worst-case scenario occurs when the tree becomes a linear chain of nodes (degenerates into a linked list), requiring a traversal through all the nodes to insert a new element at the correct position.

Adding an Element to an Unbalanced Binary Search Tree Takes