Final answer:
To create a new presentation in PowerPoint, you should click 'file' and then 'new'. Pressing Ctrl + N also accomplishes this.
Explanation:
- Clicking file open - This option allows you to open an existing presentation, not create a new one.
- Pressing ctrl + N - This key combination creates a new blank presentation in PowerPoint.
- Clicking file, new is the correct option to create a new presentation in PowerPoint.
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