When declaring class data members, it is best to declare them as what?

Question

If ClassC inherits from ClassB, which inherits from ClassA, this would be an example of what?
If you do not provide an access specificer for a class member, the class member is given this access by default?
Protected member are what?

Answer 1

If ClassC inherits from ClassB, which inherits from ClassA, this would be an example of what? Ans: Inheritance

If you do not provide an access specificer for a class member, the class member is given this access by default? Public within C++ struct, private within C++ class, package default within Java (between public and protect)

Protected member are what? I dunno what is expected nor what's asked. Encapsulated perhaps that's the answer.