Given the BinaryTree Class (Partially Shown Below), Select an Expression

question 44

Multiple Choice

Given the BinaryTree class (partially shown below) , select an expression to complete the static recursive helper method countLeaves, which returns the number of leaf nodes in the binary tree rooted at node n.

• A)n.right == null
• B)n.left == null || n.right == null
• C)n.left == null
• D)n.left == null && n.right == null

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