To exit the PowerPoint

To exit PowerPoint:

Option A: Click the application minimize button. This is incorrect because minimizing the application does not close it.

Option B: Click the document close button. This closes the current document but does not exit the application.

Option C: Double click the application's control menu icon. This is correct as double-clicking the control menu icon (located at the top left corner of the application window) exits the application.

Option D: Double click the document control menu icon. This is incorrect as it typically refers to closing the document rather than exiting the application.

Therefore, the correct answer is Option C: Double click the application's control menu icon.