Answer: C
Step-by-step explanation:
Reading text aloud from a presentation is simply boring- an audience could read the slides themselves, and it does not take much effort. If one were to read straight off the slides, they simply should've sent an email.
On the other hand, talking at a fast pace does not engage the audience- it makes them feel rushed, and they may miss important points that you mention in your presentation.
This leaves C - showing that your relaxed can help the audience feel at ease, and connect with you more- they may stay engaged, and understand the presentation's purpose.