Consider the following classes. public class Dog
{
/* code */
}

public class Dachshund extends Dog
{
/* code */
}
Assuming that each class has a default constructor, which of the following are valid declarations?

I. Dog sadie = new Dachshund();
II. Dachshund aldo = new Dachshund();
III. Dachshund doug = new Dog();

Group of answer choices

I only

II only

III only

I and II only

II and III only