After performing a simple linear regression, residuals were calculated and obtained the residual plot shown below. w N Residual -2+ -3 10 A 15 Fitted Value Does the plot indicate any potential problems with the regression? A The plot indicates the residuals are not normally distributed. B The plot shows a curved pattern. Hence, a linear model is not appropriate. C The plot indicates that the error variance is not constant. D All of the above E There are no apparent problems