This class is used to help implement mutual exclusion.

Characters such as spaces and tabs that display on your screen, but do not appear in the printed document are called ________

Fill in the blank(s) with correct word

Fonts are associated with different themes and can be customized by ________

A) using Live Preview B) using the predefined themes that come with Office 2016 C) mixing Colors and Fonts from any of the supplied themes D) clicking in the default themes option