Which of the statements is true about t distributions? A. t distributions are all symmetric and centered at 0. B. t distributions approach the standard Normal distribution when the degrees of freedom...

Which of the statements is true about t distributions?

A. t distributions are all symmetric and centered at 0.

B. t distributions approach the standard Normal distribution when the degrees of freedom decreases.

C. The higher the confidence level, the smaller the t*.

D. All of the above.