Dr. Crondall is studying who's happier - married or non-married couples. He uses people's current marital status as an independent variable because he can't randomly assign people to a married or single group. What kind of research strategy doesn't employ random assignment?
a. a correlational study
b. a quasi-experiment
c. a longitudinal study
d. a survey
e. an experiment

Why are people more likely to marry individuals with social and cultural backgrounds very similar to their own? a. parents and other family members always exert pressure to marry within the group. b. people spend a great deal of time alone, and therefore can have few opportunities for meeting people. c. people develop irrational fears of out-group members and are scared to date them. d. people have greater access to individuals like themselves.

Ahumid tropical climate brings rain in the summer and drier weather in the winter to the malay archipelago.

Sociology is best described as the systematic study of