What caused the fall of the Roman Republic?

Question
Please can you answer any Two.
1. What caused the fall of the Roman Republic?
2. How did Christianity become the official religion of the Roman Empire?
3. What Problems did Europe face during the Early Middle Ages?
4. What are the key beliefs of Islam and its major sects?

Originally posted 2017-05-06 15:28:08. Republished by Blog Post Promoter