Which of the Below Is Not True About Tukey's 100(1−α)

Multiple Choice

Which of the below is not true about Tukey's 100(1−α) % confidence interval for the difference between two population means?

A) Tukey's intervals are narrower than those based on Fisher's method.
B) Tukey's intervals are narrower than those based on the two-sample T method.
C) Tukey's intervals use a reduced significance level in comparison to Fisher's method
D) Tukey's intervals use an increased significance level in comparison to Fisher's method