When Sphericity Is Violated in a One-Way Within Subjects ANOVA

Multiple Choice

When sphericity is violated in a one-way within subjects ANOVA design,how do you proceed?

A) Explore other methods of analyzing the data besides ANOVA,because ANOVA won't work properly.
B) Interpret the Greenhouse-Geisser and/or Huynh-Feldt statistics,because they adjust for lack of sphericity.
C) Use a more liberal (i.e.,higher) alpha level to compensate for the violation.
D) Collect more data.