What Does Pareto's Law Say

What does Pareto's law say?

A) The most popular consumer products have multiple uses.
B) Half of a brand's customers account for the largest amount of a brand's overall sales volume.
C) Brand loyalists are the key to growing and establishing a brand against competitors.
D) As the Internet makes it easy and cheap to offer a vast array of content, consumers turn away from mass-market hit products they only sort of want.
E) The measure of market attractiveness is the most important element in market segmentation.