What is a cross-sectional study? What is a case-control study? Which is the superior observational study? Why? What is a cross-sectional study? Choose the correct answer below. A. Cross-sectional studies first identify a group of individuals to participate in the study. These individuals are then observed over a period of time. Over this period of time, characteristics about the individual are recorded. B. Cross-sectional studies are observational studies that collect information about individuals at a specific point in time or over a very short period of time. C. Cross-sectional studies are a list of all individuals in a population along with certain characteristics of each individual. D. Cross-sectional studies are observational studies that are retrospective, meaning that they require individuals to look back in time or require the researcher to look at existing records.