What happens as a result of the following code execution?

public class Test {
    class A {
        private void act(){};
    }
    
    class B extends A {
        protected void act(){};
    }
    
    class C extends B {
        public void act(){};
    }
    
    class D extends B {
        void act(){};
    }
    
    public static void main(String[] args){
        A obj = new Test().new D();
        obj.act();
    }
}
Explanation
Visibility of method, declared without modifiers, is less than visibility of public method. The subclass can not cut back the visibility of overridden method of an ancestor class.

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