When the Bantu peoples spread throughout Africa South of the equator the different groups develop the diverse cultures and customs but retain closely relate language how does that compare to what happen when the Nubian civilization lost control of ancientEgypt and moved south to Meroë

Explanation

The Nubians didn't really speak the same language as the Egyptians: the Nubians spoke Nubian languages while the Egyptians spoke an Afroasiatic language. They wrote in a variation of a Coptic language, which was used in Egypt.

We could consider this

d. It is different: The Nubians retained Egyptian cultural influences and continued using hieroglyphics as their written language.

but they didn't use hieroglyphs, but a variation of a Coptic script.

The correct answer is: a. It is different: The Nubians retained many Egyptian cultural influences but developed their own written language.