Federico is using diagrams in a PowerPoint presentation for his science project. He needs to draw four different circles on one slide. Although the circles should be different sizes, none of them should be stretched like an oval. They must be perfectly round circles. Which sequence of buttons and keys should Federico press to draw a perfectly round circle?

A. click Design tab → click Shapes in the Drawing group → press and hold Shift → select Oval while holding Shift → left-click on the slide and drag the mouse while still holding Shift

B. click Home tab → click Shapes in the Drawing group → select Oval → press and hold Shift → left-click on the slide and drag the mouse while holding Shift

C. click Design tab → click Shapes in the Drawing group → select Oval → press and hold Shift → right-click on the slide and drag the mouse while holding Shift

D. click Home tab → press and hold Shift → click Shapes in the Drawing group → select Oval while holding Shift → right-click on the slide and drag the mouse while still holding Shift