Which of the Following Statements Is True About Checking for the Constant

Which of the following statements is true about checking for the constant standard deviation condition?

A) If the points of the QQ plot are close to the straight line, then we can conclude the constant standard deviation condition is met.
B) If the plot of the residuals against time shows no trend, then we can conclude the constant standard deviation condition is met.
C) If the residual plot shows a fan shape, then we can conclude the constant standard deviation condition is met.
D) If the residual plot shows no features such as a trend or a fan shape, then we can conclude the constant standard deviation condition is met.