Final answer:
The correct answer is option 1: Differentiate the product from competitors.
Step-by-step explanation:
The question at hand is concerned with the opportunities marketers have at each of the three basic levels of any product to achieve a competitive advantage. The correct option is that these levels provide marketers with the opportunity to differentiate the product from competitors. Product differentiation is key in monopolistic competition, as it can influence the firm's perceived demand curve, making it either more inelastic or causing it to shift to the right.
This differentiation can arise from physical aspects, location, intangible aspects, and perceptions of the product. A successful advertising campaign plays an essential role in convincing potential customers of this differentiation, which can lead to increased sales volumes and higher prices, enhancing profits for the firm.