An 89-year-old man has smoked two packs of cigarettes a day for more than 60 years and is in excellent health. a researcher does an in-depth study of this man in hopes of revealing universal principles related to the effects of smoking on health. however, the study may not provide useful results because the man is atypical. this illustrates a weakness of which method of descriptive research?

Case study                

Explanation:

A case study in psychology is defined as the use of a descriptive research approach to gain an in-depth investigation of a person or a group. There are various ways through which case studies can be conducted such as direct-observation, personal interviews, psychometric tests. Case studies are useful in getting detailed information about the person or a group. The chances of error are also high because the experimenter can provide biased information.

according to classical republican political theory, which democratic republics would function best?

a.   small republics, with people who had similar interests

b.   large republics, with people who had competing interests

c.   republics made up entirely of landowners

d.   republics made up entirely of servants