Which of the following DNS records is used to identify a domain's SMTP server?

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

Which of the following is not a category that appears on the Assets panel?

A. Colors B. Graphics C. SWF D. Library