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 answer: 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.
Jose de San Martin, Simon Bolivar and Toussiant L'Ouverture were all leaders in South America for independence from European colonizers. So leave it to be Nopoleon was NOT a leader in South America.