Which of the Following Statements Is True Regarding Sentencing Disparity

Which of the following statements is true regarding sentencing disparity in Canada?

A) So far,no methods have been proposed to reduce sentencing disparity.
B) Sentencing disparity ultimately exists because judges are allowed a great deal of discretion when making sentencing decisions.
C) Laboratory-based studies do not show evidence of sentencing disparity.
D) Official statistics cannot be used to study sentencing disparity in Canada.
E) All of the above statements are true.