To answer this question, you need to be familiar with the keyboard shortcuts commonly used in presentation software.
Option A) Next slide button - This option is incorrect because the "Next slide" button is used to move forward to the next slide, not to go back to the first slide.
Option B) Page up - This option is incorrect because the "Page up" key is used to scroll up or move up one page, not to go back to the first slide.
Option C) Ctrl + Home - This option is correct because pressing the "Ctrl" key together with the "Home" key on your keyboard will take you to the first slide in your presentation. The "Home" key is typically used to go to the beginning or top of a document or presentation.
Option D) Ctrl + End - This option is incorrect because pressing the "Ctrl" key together with the "End" key on your keyboard will take you to the last slide in your presentation, not the first slide.
The correct answer is C) Ctrl + Home. This option is correct because it allows you to quickly navigate to the first slide in your presentation.