If the F Value Indicates That the Between-Groups Variance Estimate

If the F value indicates that the between-groups variance estimate is significantly greater than the within-groups variance estimate in an ANOVA, we can conclude that

A) there is random error.
B) the group means are from the same population.
C) the null hypothesis that the differences between the groups are due only to chance can be rejected.
D) there was an error in the calculation.