Question from the Java - Fundamentals test

Given this code :

public class JavaQuizz{
    public static void main(String args[]){
        List<String>arrayList= new ArrayList<String>();

        arrayList.add("a");
        arrayList.add("b");
        arrayList.clear();
        arrayList.add("c");
        arrayList.add("d");

        System.out.println("the answer:"+ arrayList.size());
    }
}

What will be displayed?

the answer: 4

the answer: 0

the answer: 2