Given:

Armor.java

public class Armor extends Item {
    public void use() {
        System.out.println("Armor equipped.");
    }
}

Key.java

public class Key extends Item {
    public void use() {
        System.out.println("Key turned.");
    }
}

Potion.java

public class Potion extends Item {
    public void use() {
        System.out.println("Potion consumed.");
    }
}

Item.java

public class Item {

    public Item() {/* Implementation not shown */}

    public void use() {
        System.out.println("Item used.");
    }

}

Main.java

import java.util.ArrayList;

public class Main
{
    public static void main(String[] args)
    {
        ArrayList<Item> items = new ArrayList<Item>();
        items.add(new Armor());
        items.add(new Key());
        items.add(new Potion());

        for (Item item : items) 
        { 
            item.use();
        }
    }
}

What will this program do?

1. Correct Answer
   Incorrect Answer
   a

   Prints to the console:

   Item used.
   Item used.
   Item used.

2. Correct Answer
   Incorrect Answer
   b

   Infinite loop

3. Correct Answer
   Incorrect Answer
   c

   Runtime error

4. Correct Answer
   Incorrect Answer
   d

   Prints to the console:

   Armor equipped.
   Key turned.
   Potion consumed.

5. Correct Answer
   Incorrect Answer
   e

   Compile error