A) The correct response regarding the impact of trade on the people of Southern and Eastern Africa is:
Millions of people in East Africa speak a form of Bantu.
This reflects the influence of trade on cultural exchanges and linguistic developments among communities in the region.
B) The accurate comparison and contrast of different types of trade barriers is:
Tariffs are taxes on imports, quotas are restrictions on the quantity of imports, and embargoes involve a complete prohibition of trade with a specific country.
This response correctly defines each type of trade barrier and the distinctions between them.