Recently, some American high schools have stopped buying textbooks for students and instead have opted for e-readers. Part of the reason, textbooks have become less popular is due to their great expense, but there are also other more down-to-earth reasons such as backpacks that weigh up to forty pounds. It is true that e-readers can be even more expensive than one textbook, but one e-reader can hold more than 100 textbooks' contents. Which sentence would fit the style and tone of the rest of this paragraph?