What allows List<? super Apple> to safely add an Apple object?

Generics in Java use the term "super" to represent a lower bound. In this context, "? super Apple" means that the list can accept any type that is a superclass of Apple. So, option C is correct because it allows for any type as long as it is a base type of Apple. Option A is incorrect because it specifies a lower bound, not an upper bound. Option B is incorrect because it guarantees only that the list contains Apple objects, not necessarily that only Apple objects can be added. Option D is incorrect because it does not automatically cast added objects to Apple.