The statement that best describes the languages spoken in sub-Saharan Africa is:
Four of the most commonly spoken languages in sub-Saharan Africa are used in Nigeria.
This statement is accurate as Nigeria is one of the most linguistically diverse countries in the world, with numerous languages spoken, including Hausa, Yoruba, and Igbo, which are among the most widely spoken languages in sub-Saharan Africa. The other statements are not accurate.