WHAT CAN BE INFERRED FROM THE LAST PARAGRAPH

6. What can be inferred from the last paragraph?A. American Indians lived in the region investigated nearly a thousand years ago.B. The Douglas method can be used to date all the 10

^th

century ruins.C. Scientists dated the bristlecone pine to the 10

^th

century.D. The Indian pueblo ruins were not as old as the bristlecone pines.