<span>If it's an multiple answer question it's....
</span><span>B.) Blank the screen with black screen (or return to the slide if you are currently blank).</span>
A server can have many definitions, but in this particular case, the answer is A.
<span>It is generally a good idea to set the font size to at least 30 points in presentations </span><span>to ensure readability even from a distance.</span>