The Data Collected by the Researchers Indicate That ________

The data collected by the researchers indicate that ________.

A) a hybrid zone was established after the completion of the bridge
B) there was no migration between the two squirrel populations after the bridge was completed
C) gene flow occurred from one type of squirrel into the gene pool of the other type of squirrel
D) two-way migration of squirrels occurred across the bridge but without hybridization
E) some northern squirrels migrated south, but no southern squirrels migrated north across the bridge