Answer:
Correct answer is:
building an extensive network of roads
granting citizenship to people in outlying areas
Step-by-step explanation:
First option is correct as throughout the Empire Romans built a large number of roads. The whole Empire was connected with these networks of road.
During the Empire citizenship was granted practically to everyone who lived in the borders of the Empire. Similar culture, religion and language were used across the Empire.
Feudalism was established in the Middle Ages after the fall of Roman Empire, therefore this option is false.
Colonization of North America started at the end of 15th and beginning of 16th Century.