What Is the Best Guideline for Adapting Text and Color

Multiple Choice

What is the best guideline for adapting text and color selections for each slide of your multimedia presentations? 

A) Use light text on a dark background for presentations in lightened rooms, and use dark text on a light background for presentations in darkened rooms.
B) Never break the 6-x-6 rule.
C) As a general guideline, include no more than six bullets per screen and six words per bullet.
D) Use light text on a light background for a professional, peaceful look.