Elaboration

A. involves the removal of control variables.
B. involves the introduction of control variables.
C. establishes the cause-and-effect relations between the variables.
D. specifies the different conditions under which the original bivariate relationship might hold.


Answer:
B. involves the introduction of control variables.
C. establishes the cause-and-effect relations between the variables.
D. specifies the different conditions under which the original bivariate relationship might hold.

Sociology

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