Which of the Following Statements Are Not True

Multiple Choice

Which of the following statements are not true?

A) The efficiency of the Wilcoxon signed-rank interval relative to the t interval is roughly the same as that for the Wilcoxon test relative to the t test.
B) For large samples when the underlying population is normal, the Wilcoxon signed-rank interval will tend to be slightly longer than the t interval.
C) For large samples when the underlying population is quite nonnormal (symmetric but with heavy tails) , then the Wilcoxon signed-rank interval will tend to be much shorter than the t interval.
D) All of the above statements are true.
E) None of the above statements are true.