D. 21 I believe but idk and rn just trynna put in 20 characters but yw
Answer:
B. Unification of the empire
Explanation:
I would pick B. because, in order to have an empire, you need all three of those. D makes no sense because you can't really put those two together. A doesn't really connect either. The only relation is that they have a powerful army.
Hope I helped :)
Answer:
The Romans were extremely adept engineers. They understood the laws of physics well enough to develop aqueducts and better ways to aid water flow. They harnessed water as energy for powering mines and mills. They also built an expansive road network, a great achievement at the time.
Explanation:
Answer:
The Inca Empire, also known as the Incan Empire and the Inka Empire, was the largest empire in pre-Columbian America.
The administrative, political and military center of the empire was located in the city of Cusco.
The Inca civilization arose from the Peruvian highlands sometime in the early 13th century.
Explanation:
Hope this helps
Plss brainliest
