The right answer is B)
Arabs actually reformed the Islam in North Africa in order to remove any trace of cultural or religious diversity.
The north of Africa which is basically conformed by the modern countries of Morocco,Algeria,Tunisia and Lybia.
The history of this region has been influenced by many cultures along thousands of years, going back in history even before the Roman Empire.
However, the development of sea travel, and therefore, commerce; brought this region into the Mediterranean world. At the same time, camel caravans allowed people to transport goods and travelers from other nations.
Some examples would be: