Answer :
Answer:
The best summary for the passage is:
C. How to add a Theme to your presentation.
Explanation:
Options A and B are meant to confuse us. They mix templates and themes in ways that have nothing to do with each other. The passage does mention templates, but only to let us know that themes, just like templates, come in built-in versions that you can choose from. The main purpose of the passage is to teach readers about themes and how to apply them. Even instructions are given to help readers find and choose themes when using PowerPoint. Therefore, the best option is letter C. How to add a Theme to your presentation.