I have fit a regression model predicting management style from birth order, and need to hese in a normal probability plot. W I interpret e output? O a. "histogram resid'; I assess the overall normality of the distribution O b. "scatter resid'; I look for the linear trend O c. "pnorm resid'"; I assess the separation of points from the line O d. "rvfplot"; I look for fanning around the zero line