In a within-subjects study, subjects' memory performance were measured three times with 5-year intervals to see if there are significant changes over time. The ANOVA output includes the following table, which shows that ____.

-The sphericityassumption of the data is violated.

-The individual differences in memory scores are significant.

-The grand mean of memory scores is significantly different from 0.

-The memory scores are significantly different between the three time points.