The main difference between a pure virtual function and a virtual function is:

Which of the following statements best describes the Biba security model?

A) No read up, no write up B) No write up, no write down C) No read up, no write down D) No read down, no write up

A static method can ________.

a. call only other static methods of the same class directly b. manipulate only static fields in the same class directly c. be called using the class name and a dot (.) d. All of the above.