Coefficients a Unstandardized Standardized Coefficients Coefficients Model B Std. Error Beta Sig. (Constant) 1.098 .102 10.792 000 Respondent's race 219 065 086 3.354 001 Age of respondent .013 001 288 10.734 000 Marital status 021 014 041 1.529 127 Look at this output, from a multiple regression analysis. How many variables significantly predict the outcome? O a. 1 O b. 3 O c. None O d. 4 O e. 2