Hello!
The answer is "use a dark background if your font is light colored." Letter b).
It's necessary to garantee that the slides will be clearly seen.
Catherine's team is using the concept of on-off device by using a single transmitter to reach multiple receivers.
<h3>What is a device?</h3>
It should be noted that a device simply means something that is adapted for a particular purpose especially an electronic equipment.
In this case, Catherine's team is using the concept of on-off device by using a single transmitter to reach multiple receivers.
Learn more about device on:
brainly.com/question/24786034
Your answer would be C. Internet since we all use the internet everyday to communicate through all over the world. We can currently communicate to the other side of the world with little to no effort now, almost 10 years ago it would of been very difficult.