Which choice illustrates the principle of price elasticity related to base sales?

The principle of price elasticity relates to how the quantity demanded of a product responds to changes in its price. When considering base sales, offering promotions and discounts is a prime example because these strategies directly affect the price consumers pay for a product. A reduction in price generally leads to an increase in quantity sold, demonstrating higher price elasticity—where demand is sensitive to price changes.

When a promotion or discount is in place, consumers may perceive the value of the product as more attractive, encouraging more purchases, thus illustrating the concept of price elasticity where demand increases when prices decrease. Other options, while they might influence sales, do not capture the direct relationship between price changes and the immediate response in base sales as clearly as promotions and discounts do. For instance, increasing product visibility or changing packaging can enhance demand through improved perception or accessibility but do not involve altering price, which is the crux of the price elasticity concept. Similarly, increasing product quality may lead to a higher willingness to pay but does not inherently involve a price reduction that would demonstrate elasticity in demand.