Which of the following is a security benefit gained from setting up a guest wireless network?

Manufacturers identify their label sheets by using a(n) ________

Fill in the blank(s) with correct word

A pure virtual function

A) must be overridden in a derived class for the function to be useful. B) executes more efficiently than a non-pure virtual function. C) must be accompanied by a virtual constructor of the same class. D) All of the above E) None of the above