In the Printout of Results for a Repeated-Measures Analysis of Variance

Multiple Choice

In the printout of results for a repeated-measures analysis of variance, an F score for "mean" or "constant" sometimes appears. Why is this statistic often not interesting even if it is significant?

A) It shows differences between time sessions which are not important.
B) It is a randomly generated number.
C) It shows that the population mean is or is not equal to zero which is often of no interest.
D) It is redundant information given the F score for the time variable.