Which of the following statements are true?

A. As the value of increases, so does the value of.

B. The probability of a Type I error is also the significance level of the hypothesis test.

C. If, in reality, the null hypothesis is false, both a Type I and Type II error can be committed.

D. As the probability of Type II error increases, the power decreases.

E. In practice, the probability of a Type I error is fixed at a reasonable level.