Answer:
D. maturity
Explanation:
A product life cycle is divided into four, namely, introduction, growth, maturity, and decline. The concept of the product life's cycle is used as a decision-making tool to help management know when to expand to new markets, increase advertising, adjust prices, or redesign a product.
The maturity cycle is the third stage of a product life cycle. At this stage, sales revenues and sale volume reach the peak. The market get saturated with very few new customers. The product growth becomes stagnant. Profits may begin to decline at this stage.
