What is a central idea of the passage?
OA. People enjoy visiting the various deserts that make up the ecology and landscapes of southern and central,
California.
OB. As long as California has been a part of the United States, citizens and visitors have largely preferred to hike rather
than to live in its deserts.
OC. Conservationists worked for decades to pass legislation that protects the ecology and landscapes of California's
deserts.
OD. To protect an endangered species of turtle in California, voters have attempted to pass legislation declaring
California's parks national preserves.