Since the $p$-value is not explicitly given, we will assume it is provided and compare it to the significance level $\alpha = 0.05$.
If the $p$-value $\leq 0.05$, the correct answer is:
\[
\boxed{\text{B. Reject the null hypothesis. There is sufficient evidence to conclude that not all Factor B means are equal.}}
\]
If the $p$-value $> 0.05$, the correct answer is:
\[
\boxed{\text{A. Do not reject the null hypothesis. There is insufficient evidence to conclude that not all Factor B means are equal.}}
\]