The development in the early 1800s that best represented the continuation of the ideas expressed in George Washington's Farewell Address is:
d. The rise of a foreign policy of non-involvement.
Washington's Farewell Address emphasized the importance of avoiding permanent alliances and entanglements with foreign nations, advocating for a foreign policy that was cautious and non-interventionist. The rise of a foreign policy of non-involvement aligns closely with this perspective.