Read the following paragraph and cross out TWO irrelevant sentences.

For a long time a diverse population of Native American tribes prospered on the rich lands of California. Before European settlers arrived, an estimated 300,000 native people lived in small villages throughout the area. Some Native Americans are still living in California today. Contact with the new settlers brought about serious disruptions to the native way of life. The Gold Rush of 1848 brought still more devastation. Violence, disease and loss brought by the European settlers overwhelmed the tribes. By 1870, an estimated 30,000 native people survived in the state of California, forced to live on without access to their homelands. A professor of Native American Studies was interviewed about the European idea of land. The native tribes of California lived by hunting and gathering the fertile resources of the land. Their culture and religion place them in the role of caretakers not owners of the land, preserving it for the future.