What was the name of the 1906 law, signed by Theodore Roosevelt, that gave the president authority to create national monuments from federal lands to protect significant natural, cultural, or scientific features?

• A Organic Act
• B Wilderness Act
• C National Park Service Act
• D Antiquities Act ✓

The Antiquities Act has been used by nearly every president since Roosevelt to create over 150 national monuments, including the Grand Canyon before it became a national park.