Which of the following is not a commonly used property of a label control form?

When low-level disk formatting occurs, a set of concentric circles called ________ are created

Fill in the blank(s) with correct word

You should use a ComboBox when:

a) aesthetic reasons dictate it. b) there are many choices. c) they want to allow the user to select from pre-set options. d) all of the above. e) a) & c).