In an Analysis of Variance Summary Table, If the Mean

In an Analysis of Variance Summary Table, if the Mean Square Between = 13 and the Mean Square Within = 21, then the null hypothesis of the groups having the same mean is

A) acepted because 13 < 21.
B) rejected because 13 < 21.
C) cannot be determined without knowing the Sums of Squares (between and within) .
D) cannot be determined without knowing the Degrees of Freedom (between and within) .