Paul predicts that people who are more attractive do better on quizzes. In a regression, he includes a measure of attractiveness as a predictor variable and quiz performance as a criterion variable. In his analysis, he finds R = .18, p = .55, and the partial regression coefficient for attractiveness is B = .08, p = .045. We would say Paul: Failed to support his hypothesis because the partial correlation was positive Failed to support his hypothesis because R was not significant Failed to support his hypothesis because B was not significant Both 'a' and 'c' Both 'a' and 'b