What Suggestion Presented in Your Textbook for Using Supporting Materials $\text{\textemdash}$

What suggestion presented in your textbook for using supporting materials is used in the following speech excerpt?
Since it first opened for business, McDonald's has sold more than 100 billion hamburgers. To give you an idea how many hamburgers that is, think oit this way: Since each McDonald's burger with the bun) is about 2 inches thick, 100 billion hamburgers stacked on top oeach other would reach over 3 million miles $\text{\textemdash}$ fifteen times as far as the moon.

A) Explain your statistics.
B) Present testimony from qualified sources.
C) Use examples to quantify ideas.
D) Quote or paraphrase accurately.
E) Use statistics instead of examples.