It would help if you listed the answer chioces
Answer:
The Incas focused on innovations in agriculture, while Aztecs focused on transportation.
Answer:
McCulloch v. Maryland (1819) is one of the first and most important Supreme Court cases on federal power. In this case, the Supreme Court held that Congress has implied powers derived from those listed in Article I, Section 8. The “Necessary and Proper” Clause gave Congress the power to establish a national bank.
Explanation:
It provided free and safe travel across the Silk Road, it isolated Russia, and helped spread the bubonic plague