Which of the following types of promotional offerings can help drive sales by offerings limited-time savings?

Deals are promotional offerings that provide limited-time savings on products, directly incentivizing immediate purchases. They are designed to create urgency and drive sales volume within a specific timeframe. Promotions is a broader term encompassing various marketing activities, including advertising, public relations, and sales promotions (like deals), but it doesn't specifically refer to limited-time savings. Therefore, "Deals" is the most precise answer for offerings that help drive sales through limited-time savings.