That could go both ways, maybe they didnt own a plantation or have use for a slave. But they still could support it. Or, they could be completely against it, and think its completely wrong and dehumanizing, they could help runaway slaves get to the north.
Answer: a tribe with many villages.
Explanation:
There were several advantages that the Germanic Tribes have in their conflicts with the Roman Empire during the 3rd to 5th centuries. since you provide no options, one of the advantage that they have is that they know the terrain better and are really used to it