Question: What is wrong with the getFun method? private int getFun ( Node head ) { if ( head = = null ) return 0 ;elseint

What is wrong with the getFun method? private int getFun (Node head){if (head == null)return 0;elseint length =0;length = length + getFun (head: head. left);length = length + getFun (head: head.right);return length A. It returns one less than the actual number of nodes. B. It returns the correct number of nodes.O C. It returns 1,0,-1 to calculate Balance Factor. D. It always returns 0.

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