A Population of Butterflies Has an Allele B for Big

A population of butterflies has an allele B for big spots on the wings and b for small spots on the wings. The table below provides data about this population. $\begin{array} { l l l l } \text { Genotype } & B B & B b & b b \\\text { Number of butterflies } & 300 & 400 & 300 \\\text { Genotype frequency } & 0.3 & 0.4 & 0.3\end{array}$
Regarding these data about the butterfly population, which of the following statements is correct?

A) The population is in Hardy-Weinberg equilibrium because the number of B alleles is equal to the number of b alleles.
B) The population is in Hardy-Weinberg equilibrium because half of the heterozygotes are B and half are b.
C) The population is not in Hardy-Weinberg equilibrium because p2 and 2pq are different.
D) The population is not in Hardy-Weinberg equilibrium because the genotype frequency of bb is greater than it would be in equilibrium.