The correct answer is Option B) Former Roman lands were split up and claimed by Germanic kingdoms.
As the Roman Empire collapsed in Europe, the former lands were claimed by, fought over and split up among competing Germanic kingdoms.
Romans had conquered a large part of modern-day Europe and had defeated tens of little kingdoms and rulers. In modern terms the 'Western Roman Empire' consisted of countries such as Ireland, Great Britain, France, Germany, Italy, Turkey, Spain, Portugal, Bosnia, Hungary, etc.
However, as soon as the Roman Empire gradually collapsed, a power vacuum was quickly filed by the powerful governors, local nobility, and various powerful Germanic tribes.
For example, as soon as the Romans left Britannia, the local kingdoms in Wales, Scotland, England and Ireland started to take modern shape with local kings.