When using the ROUND functions, the value of the Num_digits argument is always 0 or a positive number

Base class constructors and assignment operators:

a. Are not inherited by derived classes. b. Should not be called by derived class constructors and assignment operators. c. Can be inherited by derived classes, but generally are not. d. Can call derived-class constructors and assignment operators.

Which of the following best describes a wiki?

A. A group of related webpages to which users add, edit, or delete content. B. An online encyclopedia. C. An online course delivered over the web, often for free. D. A word or phrase used as a form of commentary.