Answer: d)Use a remote control to advance slides when possible
Explanation:
Based on the information given, since Cynthia asked how she might improve, the best guideline is that she should remote control to advance slides when possible.
In this scenario, she's using a keyboard to advance her slides, and she was also careful not to block the projection. Using a remote control will have made her job easier as she won't be concerned if she blocked the projection while pressing the keyboard as she can stay from a farther distance that won't block the view of others. Also, a scenario whereby the slides are out of order can be managed and avoided.