Aresearcher is studying how depression tends to be experienced by people of different ages. the researcher interviews depressed adolescents, young adults, individuals in their 30s and 50s, and those over 70 years old. the research design being used is called . cross-sectionalb. longitudinalc. experimentald. case-study

(A). Cross-sectional

Explanation:

A cross-sectional research design is used to collect information on a single variable at a particular time, from different population groups with similar characteristics.

In this case, the research variable being studied is depression, while the individuals are grouped according to ages.

the answer would be a)henry grady because he came up with the term "new south"