Read the excerpt from "A Short Walk Around the Pyramids and throughout the World of Art." This piece of sculpture is very different from Ancient Greek carving, through it, too, is a part of an old religious tradition. It is made of hard wood covered with small plates of brass and copper and comes from Gabon, a West African country that straddles the equator. It was made by the Kota, a group of tribes who worship in similar ways, and who have made figures such as this for a hundred years, and probably much longer.

Which text feature would best strengthen the reader's understanding of the text?

A. a photograph of the West African sculpture.
B. a map of the countries in West Africa
C. a sidebar about the West African tribe
D. a table comparing Greek and West African sculpture