Many people living in west and central African countries such as Niger, Chad, and the Central African Republic speak French. Which of the following best explains this pattern? The French language originated in west-central Africa and diffused to Europe.

The French language originated in west-central Africa and diffused to Europe.
A

Muslims brought the French language into Africa from France.

Muslims brought the French language into Africa from France.
B

Slaves freed from France in the late 1800s relocated to the region that is now Niger and the Central African Republic.

Slaves freed from France in the late 1800s relocated to the region that is now Niger and the Central African Republic.
C

France acquired several countries in Africa as a result of decisions made during the Berlin Conference of 1884.

France acquired several countries in Africa as a result of decisions made during the Berlin Conference of 1884.
D

French diffused hierarchically into the largest cities of Africa after the Second World War.