I am interested in whether the presence of a loudly ticking clock is associated with greater irritation. However, prior literature states that that individual tendency towards grumpiness is a significant predictor of irritation. The best statistical analysis to test this would be: O a. None of the other options are correct O b. Multiple regression, with both 'ticking clock' and 'grumpiness' as IVs and 'irritation' as the DV O c. Correlation, testing the association between 'ticking clock' and 'irritation' O d. Two simple linear regressions, with 'ticking clock' and 'grumpiness' as IVs in separate regression models