Answer:
d. there is fierce price competition among sellers.
Explanation:
Remember there are five stages in a product's life cycle. The third stage is the Maturity Stage.
Fierce or aggressive price competition exists in this stage because when a product passes the growth stage it does not go unnoticed by others in the industry. During this stage prices and profits decrease because of increased competition.
One solution against this trend is for companies to develop new use cases for their product.