Final answer:
The technique used to assess market potential in specific visitor markets is online surveys. This method allows businesses to collect and analyze consumer preferences and behaviors efficiently.
Step-by-step explanation:
To assess market potential in specific visitor markets, the correct technique is online surveys. This method involves collecting data directly from potential customers to understand their preferences, behaviors, and demographic information. Option 3, online surveys, are particularly useful as they can reach a wide audience quickly and can be analyzed for trends and insights. These surveys could include questions like those mentioned in the examples, such as how many times customers visit a store before making a purchase, their age, or how a political debate might have changed voter preferences. Businesses and researchers use this information to gauge demand, market structures, and consumer purchasing decisions, which are vital in making informed decisions on market strategy.