The correct answer is: A. select the box and text, then make changes.
To edit the text within the boxes of an organization chart, you first need to select the box and the text you want to edit. You can do this by clicking and dragging your mouse over the box and text. Once the box and text are selected, you can make your changes by typing over the existing text or by using the formatting tools to change the font, size, color, etc. of the text.
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 cannot highlight the text without also selecting the box. Option D is incorrect because only option A is correct.