The answer would be Plymouth.
The nation which does NOT have a federal system of government is;
C. United Kingdom
The steps taken by
Incas to unite the empire in the given options are:<span>
1) They built a vast network of roads, bridges, and tunnels.
2) They imposed their language and religion on conquered peoples.
These factors helped them empire unification. Incas are known to have risen as
the strongest Andean Civilization.</span>