The correct answer is B)
The local language and the language used for official business is not the same. Most Africans in sub-Saharan Africa still speak their native tongue, even if they also understand specific European languages, e.g. French, English, Spanish, etc. or/and live in nations that have "English" or "French" as their official language. There is immense diversity within the 750 million people in Subsaharan Africa, and within each country are cultural and ethnic groups with their history, language, and religion. Three of the six dominant languages in Subsaharan Africa are spoken by at least ten million people or more are spoken in Nigeria: Hausa, Yoruba, and Ibo. The three remaining significant languages of Subsaharan Africa are Lingala, Swahili, and Zulu.