Final answer:
The statement that 'The Viking raids were a widespread threat throughout Europe' is supported by the information provided, showcasing the far-reaching impact of their activities, including raids and trade from Scandinavia to Byzantium and beyond.
Step-by-step explanation:
In addressing which statement is supported by the presented information about Viking influence and activities, it becomes clear that the statement 'The Viking raids were a widespread threat throughout Europe' is the most accurate. The Vikings, utilizing their seafaring expertise and longships, established themselves as a notable naval power, conducting raids and engaging in trade across various regions. They targeted monasteries for plunder, including valuable items such as silver, and even reached as far as Constantinople, where the Scandinavian Vikings, also known as the Varangians, served as mercenaries for the Byzantine ruler. Additionally, their voyages encompassed areas from Russia to Iceland and even North America, highlighting their far-reaching impact besides just coastal communities.