Hi there!
The answer you are looking for is option C. A pause or hesitation.
<em>A comma can be used to give direction either to a reader or a speaker to where to take a pause,</em><em> </em>and also to make the sentence most effective and convincing. In other words, a comma can be used near the end of a sentence to separate contrasted coordinate elements or to indicate a distinct pause or shift.
I waited on the playground for amber
“Franklin, Benjamin.” Encyclopedia Britannica. 15 Ed., 2002
Answer:
When planning and giving a speech, it is important to do all of the following in this list. Making a speech to an audience is pointless if nobody is interest and/or engaged.
Explanation: