For the following given class,

class Node { private T data; // Entry in bag private Node next; // Link to next node private Node() { this(null, null); } // end constructor private Node(T dataPortion) { this(dataPortion, null); } // end constructor private Node(T dataPortion, Node nextNode) { data = dataPortion; next = nextNode; } // end constructor } // end Node

which code correctly adds the first entry to an empty bag?

A		Node newNode = new Node(newEntry, null); firstNode = newNode;
B		Node newNode = new Node(); newNode = newEntry; firstNode = newNode;
C		both a & b
D		none of the above