I believe they used a atir
Answer:
This type of research is an example of the research method called cross-sectional research.
Explanation:
Cross-sectional research is a research design or method used in observational studies. The reseracher measures the dependent variable in different population groups at the same point in time. The population groups or cohorts are chosen depending on the research question, they can be based on age (like in the example in the question), gender or race, among other categories. Usually the outcomes are compared to one another.
Answer:
B
Explanation:
Back then, slaves weren't considered people by the majority. They just wanted a larger representation in Congress, which they would get with a bigger population. More slaves=bigger population=more representation=more power.