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Question 201·Hard·Transitions

Historians once assumed that the Viking presence in North America was brief and inconsequential. Recent archaeological excavations at L'Anse aux Meadows in Newfoundland reveal evidence of metalworking and sustained habitation, suggesting a more significant settlement. ______ some scholars are reevaluating Norse sagas as potential sources of historical data rather than mere legends.

Which choice completes the text with the most logical transition?