The best statement that 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 reflects the linguistic diversity present in the region, particularly in Nigeria, which is home to several major languages, including Hausa, Yoruba, and Igbo. The other statements either overgeneralize or inaccurately represent the linguistic landscape of sub-Saharan Africa.