The teenager has developed a B. A marketing plan.
A marketing plan typically includes the market analysis, a description of the target market, the services or products offered, pricing strategies, promotional ideas, and details about the geographic area to be served. The other options, such as a marketing program, SWOT analysis, marketing strategy, and differentiation/segmentation, either represent specific components of a marketing plan or focus on different aspects of marketing that are not fully comprehensive like the marketing plan itself.