Object Oriented Programming Basic Concept C

Question

As We know

The Default Modifier of Class, Struct, Delegate, Interface, and Enum is Internal.

1. Enum & Interface members by default are public.

2. And Class, Struct, and Delegate members by default are private.

3. Non-derived classes of the same class library can have access to public and internal classes (and public, internal, and protected internal members).

4. Non-derived classes of different class-library can have access to public classes (public members only).

5. Derived classes of different class-library can have access to public classes (public, protected, protected-internal members).

Now I want to understand the core concept that why is so that...

Protected members are having more scope than internal?