"Rome was built on hills which made defenses easier. The Tiber River was a source of water and the Alps protected it from the north".
-Answers.com
Answer:
A constitution is an aggregate of fundamental principles or established precedents that constitute the legal basis of a polity, organisation or other type of entity, and commonly determine how that entity is to be governed
Explanation:
The movement of Soviet troops into Afghanistan.
I believe it is C. Memorials to powerful former leaders