What are the independent and dependent variables in this study? Choose the best option from those listed below. There is one independent variable: the Bragger manipulation (Truthful Bragger vs. Untruthful Bragger). There are two dependent variables. First, there is the participant ethnicity (Caucasian vs. African American). Second, there is the rating of how likeable Edward is (1 - do not like him at all to 9 - like him very much). There are three independent variables. First, there is the Bragger manipulation (Truthful Bragger vs. Untruthful Bragger). Second, there is the participant ethnicity (Caucasian vs. African American). Third, there is the rating of how likeable Edward is (Very likeable vs. Not likable). The dependent variable is whether Edward was truthful in the biography. There are two independent variables. First, there is the Bragger manipulation (Truthful Bragger vs. Untruthful Bragger). Second, there is the participant ethnicity (Caucasian vs. African American). There are two dependent variables: whether Edward was truthful in the biography and the rating of how likeable Edward is (1 = do not like him at all to 9 = like him very much). There are two independent variables. First, there is the Bragger manipulation (Truthful Bragger vs. Untruthful Bragger). Second, there is the participant ethnicity (Caucasian vs. African American). There is one dependent variable: the rating of how likeable Edward is (1 - do not like him at all to 9 - like him very much). There are four independent variables. The first is the Truthful Bragger condition. The second is the untruthful Bragger condition. The third is Caucasian participants. The fourth is African American participants. The dependent variable is the rating of how likeable Edward is (i = do not like him at all to 9 = like him very much).