B) The Arab Empire unified feuding tribes under the religion of Islam.
At the begining of the Arab Empire, many arab tribes were united by the Islam new religion led by Prophet Mohammed. The crusades to spread the Islam word, helped to conquer and to unify regions of North Africa and Middle East. The language and laws of the Quran were embraced as well as the pilgrimage to Mecca. The Arab language spread and became popular too.
Answer:
More technologically advanced things here, such as electronic cars that can drive by themselves, a smartphone with a touchscreen. There are also constuction trucks and things to that nature that were not like the ones in the past. There are computers and artificial intelligence also.
Hopes this helps.
A dictator is what your looking for