What is the output of this program? import java.util.*; class Maps { public static void main(String args[]) { TreeMap obj = new TreeMap(); obj.put("A", new Integer(1)); obj.put("B", new Integer(2)); obj.put("C", new Integer(3)); System.out.println(obj.entrySet()); } }

• A. [A, B, C].
• B. [1, 2, 3].
• C. {A=1, B=2, C=3}
• D. [A=1, B=2, C=3].