Which statement about the mound builders is false?
a.) some of the mound builders' mounds may have been religious symbols.
b.) the mound builders' flourished over 6,000 years ago.
c.) some of the mound builders' mounds were graves.
d.) the mound builders lived in cities.
: ) me and make sure your right.

B.) The Mound Builders' flourished over 6,000 years ago

Explanation:

The Mound Builders were several different cultures that existed in Northern America. These were people that were ancestors to the Native Americans we know nowadays. The mounds were built because of numerous purposes. Some of those purposes were elite residential objects, religious purposes, as well as for ceremonial and burial purposes. Some mounds are relatively small, while some are very large. The material from which the mounds have been built is actually ground, not some sophisticated material. The majority of the mounds though seem to be made because of religious purposes, and they have been aligned with some natural features and space objects that gave some meaning to the people building them. The Mound Builders flourished for roughly 5,000 years, starting from 3,500 BC until the European colonization.