Migration Causes Changes in the Allelic Frequency of a Population $q^2$

Migration causes changes in the allelic frequency of a population by introducing alleles from other populations. The magnitude of change due to migration depends on both the extent of migration and the difference in allelic frequencies between the source and the recipient populations. Migration decreases genetic differences between populations and increases genetic variation within populations.
-Each generation, 10 random individuals migrate from population A to population B. What will happen to allelic frequency q as a result of migration when q is equal in populations A and B?

A) q in A will decrease.
B) q in B will increase.
C) q will not change in either A or B.
D) q in B will become $q^2$