Can y’all help me on num 4

Hold up. this randomly appeared while I was making the comment and messed everything up. ANYWAYS... I'm pretty sure the answer is A because "Perpetuation" means "the continuation or preservation of a situation, idea, etc." This definition still matches the the definition of the word "continuation" in the text.

Explanation:

The reason I believe that it is not B is because the word "completed" that it has as a replacement for "rooted"  does not match the use of the word in the text.

swahili is an extremely rich and complex civilization, a set of ethnic groups articulated by a language and a series of cultural elements that fuse the african traditions, islam and indian culture. this growth was largely a result of the indian ocean trading network that brought in not just man-made riches, but also religious ideas, specifically islam, which had a significant impact on the local culture. furthermore, the development of the swahili language gave a common cultural unity to the people.

haile selassie i was the emperor of ethiopia from 1930-1974