Rail - a bar or series of bars, typically fixed on upright supports, serving as part of a fence or barrier or used to hang things on
road - a wide way leading from one place to another, especially one with a specially prepared surface which vehicles can use.
The right answer for the question that is being asked and shown above is that: " message and help the audience retain the information presented" PowerPoint should reinforce the speaker to present a <span> message and help the audience retain the information presented</span>
Answer: i would go with diverse
Ur answer is d !!! Good luck
