Which of the following statements best describes diversity in sub-saharan africa?
a.
sub-saharan africa is not diverse, as most people belong to the same few ethnic groups and speak one of only a few languages.
b.
sub-saharan africa has a wide diversity of ethnic groups, but most people speak one of a few languages.
c.
sub-saharan africa has a wide diversity of languages, but most people belong to only one of a few ethnic groups.
d.
sub-saharan africa is extremely diverse, as its people belong to hundreds of different ethnic groups and speak more than 100 languages.