if the choices are...
A. The Justinian Code became the legal system that was used.
B. Greek became the most widely spoken language in those areas.
C. The Byzantines spread Orthodox Christianity in those area.
D. The Byzantine army often defended Russia and Eastern Europe from invaders.
The correct answer is C
It is false that Communism was the dominant economic force of the twentieth century, although it certainly overtook a great deal of territory. Capitalism was still overall dominant.
It’s D. It created the first system of irrigation
hope this helps!!