Answer:
C. It is often impossible to identify with precision where a product is in the product life cycle.
Explanation:
A product life cycle consist of different stages in the life cycle of a product that determine how much more profit it can bring to the firm and lets the firm know when they need to come with a new plan or what they need to do in order to keep the sales from dropping.
It is hard to figure out which stage each product is because the characteristics of each stage are over lapping. There is always room for error.