Answer:
When the Western Roman Empire collapsed, one other Roman Empire was still in power until 15th century. This was the Eastern Roman Empire and its other name was the Byzantine Empire- the correct answer is A
I believe it's A.) A means of communication. It depends on what you're using it for in a sentence. Hope this helps! :))
They were both apart of the allies
for the last one the soviets construed the Berlin Wall
There is no given name to the person who discovered the parallelogram.
