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
Medieval doctors learn treatment from Romans
The concept of predestination was a major part of Calvinism. There was actually a doctrine of predestination within Calvinism, which dealt with the amount of power that God exercised over the universe.
