The correct answer is: A. Select the box and text, then make the changes.
To edit the text within the boxes of an organization chart, you need to select the box and the text you want to edit. Once you have selected the text, you can make the changes you want.
Option B is incorrect because you need to select both the box and the text in order to edit the text. Option C is incorrect because you need to select the text in order to edit it. Option D is incorrect because you need to select the text and then make the changes.