The similarities between Federalists and Democratic-Republicans can best be captured by the following option:
d. both were strong supporters of the Constitution.
While they had different interpretations and visions of the Constitution and governance, both groups ultimately supported the foundational document of the United States. Options a, b, and c highlight distinctions between their economic philosophies and policies, with Federalists generally favoring a more centralized federal government and broader economic powers, while Democratic-Republicans favored states' rights and agrarian interests.