What is a cross-sectional study? Choose the correct answer below. A.
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.
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 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.
D.
Cross-sectional studies are a list of all individuals in a population along with certain characteristics of each individual.