A Researcher Observes an Association Between Hours Spent at Work

A researcher observes an association between hours spent at work and the risk of divorce.She controls for personal distress,thinking distress might explain why work hours would cause divorce.To assess this,the researcher will look for a change in the relationship between work hours and divorce once distress is added to the regression model.This is different from testing for a confounding variable because a test for confounding variables is conducted to determine if the association between the independent and dependent variables

A) is due to the common influence of the confounding variable.
B) is contingent upon the value of the confounding variable.
C) actually occurs in the reverse direction than hypothesized.
D) is actually an indirect pathway through the confounding variable.