Sociology can be approached from both a micro-sociological and a macro-sociological perspective. which is more useful? the macro-sociological perspective is more useful, because it explains how large-scale social institutions influence individuals. the micro-sociological perspective is more useful, because it explains how individuals shape and create large-scale social institutions. both are useful in different ways, because any study that uses only one or the other will be unable to explain anything useful about society. both are useful in different ways, because they each provide different types of information about the same object of study.

Letter D is the correct answer.

Even though both perspectives have the same object of study, both perspectives are equally useful since they provide different types of information. While microsociology focuses on smaller groups at a community level examining the interactions among individuals in their everyday lives, macrosociology emphasizes large-scale patterns and trends of populations and social systems.  

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answer; i believe the correct answer is (4) flip a coin as each participant arrives,heads indicates assignment to the first group: tails indicates assignment to the second group;