The Mounds
3 The Etowah Indian Mounds Historic Site, located near the Etowah River, has six mounds. Three of the mounds—called A, B, and C—are the most famous features of the site. Native Americans built the mounds beside two, open plazas. The mounds have four sides and flat tops. Native Americans used steps to get to the tops of the mounds. They also built a ditch that served as a protective barrier around the mounds.
In paragraph 3, what point is the author making when she describes a ditch surrounding the mounds?
A) The ditch could stop others from invading the town.
B) The ditch was added to make the site more beautiful.
C) The Native Americans were skilled at making ditches.
D) Scientists cannot research the site because of the ditch.