The correct answer is A. Census Bureau.
The Census Bureau is a government agency that collects and publishes demographic and economic data about the United States. This data is available to the public for free and can be used for a variety of purposes, including marketing research.
B. salespeople focus on selling products or services, not collecting data.
C. focus groups and D. personal interviews are primary research methods, meaning that the data is collected directly from the target audience.
Therefore, the only option that is a source of secondary research information that provides demographic and economic data is the Census Bureau.
Here are some examples of the types of data that the Census Bureau publishes:
Population counts
Age distributions
Educational attainment
Income levels
Employment rates
Housing characteristics
Business data
This data can be used by marketers to understand their target audience, identify new market opportunities, and evaluate the effectiveness of their marketing campaigns.