Express the ratio in simplest form.6 in. : 6 ft

Which of the following is a recommended way of informing users that a form is read-only?

A) There is no need to inform the user. B) Have a message box appear any time the form is opened. C) There is never a need to make a form read-only. D) Include a note in the form title.

virtual destructors must be used when:

a. The constructor in the base class is virtual. b. delete is used on a base-class pointer to a derived-class object. c. delete is used on a derived-class object. d. A constructor in either the base class or derived class is virtual.