What is the difference between List<Apple> and List<? extends Fruit>?

List specifies a List that can only contain Apple objects, while List<? extends Fruit> specifies a List that can contain any type of Fruit (including Apple). Option A is incorrect because List can only contain Apple objects, not any type of Fruit. Option C is incorrect because List and List<? extends Fruit> have different specifications. Option D is incorrect because there is a clear distinction between List and List<? extends Fruit> in terms of which types of objects they can contain.