Which germanic people moved into the western roman empire?

The Germanic people who moved into the Western Roman empire included  Alemanni, Burgundians, Vandals, Lombards, Franks etc.

Explanation:

The Germanic people were the semi-nomadic people who herd their packs and tilling the soil. The Germanic people's society based on tribal, where loyalties lie towards kinship. The Germanic people like vandals began to invade the Western Roman Empire as they grew powerful to defeat the frontiers and move towards the Roman Borders. Other German tribes including the Franks and Burgundians, moving into the empire.

the answer wold be b) travel among nations should be regulated by an international organization

c it says nothing about connecting those 2 seas.