Given the Node Class (Partially Shown Below), Select a Statement

Multiple Choice

Given the Node class (partially shown below) , select a statement to complete the recursive method descendants, which is designed to return the number of descendants of a node.

A) num = num + child.descendants() ;
B) num = num + child.descendants() + 1;
C) num = child.descendants() ;
D) num = num + child.children.size() ;