Final Answer:
The stage during which a new product has gained some acceptance, thus causing first-time buyers to eagerly acquire the product and accelerate demand, is the Growth stage (Option C).
Step-by-step explanation:
The product life cycle consists of several stages, and the Growth stage is characterized by increasing acceptance and demand for the product. During this stage, initial adopters are followed by a broader market, leading to a rapid increase in sales. First-time buyers are eager to acquire the product, and positive word-of-mouth contributes to accelerating demand.
Option A (Innovation) pertains to the introduction of the new product. Option B (Shakeout) typically occurs in the later stages when competition intensifies. Option D (Maturity) follows the Growth stage and represents a period of stabilized demand.
Option C is the answer.