Trey Wants to Insert Three Identical Triangles on a Slide

Trey wants to insert three identical triangles on a slide. Which of the following methods is the best way to do this?

A) He should draw and format the first shape, and then very carefully draw the other two shapes.
B) After drawing and formatting the first shape, he should drag it while pressing ALT.
C) After drawing and formatting the first shape, he should copy it to the Clipboard, and then use the Paste command twice.
D) He should draw and format the first shape, and then use the Flip command twice.