The correct answer is D. The Fill/Back Color button on the formatting toolbar applies color to the background of the selected control.
Option A is incorrect because the border of the selected control is applied color by the Border Color button.
Option B is incorrect because the text in the selected control is applied color by the Font Color button.
Option C is incorrect because all aspects of the control are not applied color by the Fill/Back Color button. Only the background of the control is applied color.