The correct answer is:
C. Olmec
The Olmec civilization used to create stone representations of human heads sculpted from large basalt boulders, these are called " Olmec colossal heads". The heads date from at least 900 BC and are a distinctive feature of the Olmec civilization of ancient Mesoamerica.
The answer is c they learned how to grow food and survive from the american indians
<span>the area was called the demilitarized zone</span>
