The pseudo-class _____ matches check boxes or option buttons whose toggle states (checked or unchecked) cannot be determined.

In HTML, a form input element includes a ____ attribute that specifies the type of form object you are inserting.

A. baseline B. selector C. class D. type

The ____ setting, which ranges from 1% to 100%, determines how sensitive the Magnetic Lasso Tool is to edges.

a. Frequency b. Contrast c. Radius d. Circumference