Final answer:
The correct answer is D) adoption. All of the other options, A) introduction, B) growth, C) maturity, and E) decline, are stages in the Product Life Cycle (PLC).
Step-by-step explanation:
The correct answer is D) adoption. All of the other options, A) introduction, B) growth, C) maturity, and E) decline, are stages in the Product Life Cycle (PLC). The PLC is a concept in marketing that describes the various stages a product goes through, from introduction to decline. However, adoption is not a stage in the PLC, but rather refers to the process by which individuals or groups accept and start using a new product or innovation.