What is the output of this program? import java.util.*; class Output { public static void main(String args[]) { HashSet obj = new HashSet(); obj.add("A"); obj.add("B"); obj.add("C"); System.out.println(obj + " " + obj.size()); } }

• A. ABC 3
• B. [A, B, C] 3
• C. ABC 2
• D. [A, B, C] 2