Why Might It Be Useful to Use a Stricter Criterion

Multiple Choice

Why might it be useful to use a stricter criterion than 0.05 for accepting an F statistic as significant in a factorial design?

A) Because the F statistics are independent and thus do control the Type I error rate.
B) Because the F statistics are independent and thus do not control the Type I error rate.
C) Because the F statistics are not independent and thus do not control the Type I error rate.
D) Because the F statistics are not independent and thus do control the Type I error rate.