The correct answer to this open question is the following.
Although there are no options attached, we can say the following.
The one-drop rule impacts how we explain race in the United States and how it impacts racial relationships in that it was a racial denomination that served to classify people during the 1900s on the basis of their ancestry. In this case, if people had one ancestry that had been bñack, it was considered as black.
It always had racial connotations and has created much controversy for the racial connotations in the United States. The one-drop rule has contributed to the racial discourse that has divided the United States since the very beginning.