Which of the Following Best Illustrates the "80-20" Principle

Multiple Choice

Which of the following best illustrates the "80-20" principle?

A) Eighty percent of our products are sold in 80 percent of our territories.
B) Sales increased 15 percent last year.
C) Seventy-two percent of our customers account for only 12 percent of our sales.
D) Volume increased 80 percent,but profits increased only 20 percent.
E) Total sales increased 12 percent,but sales in the western region declined 3 percent.