Who lived in America before the Europeans arrived?

The correct answer encompasses both "American Indians" and "Native Americans," recognizing that these terms refer to the original inhabitants of the land before European exploration and colonization. The indigenous peoples of America had diverse cultures, languages, and societies established long before Europeans made contact in the late 15th century.

While "American Indians" is a term historically used to describe the indigenous peoples, "Native Americans" is a more contemporary term that acknowledges the diverse tribes and cultures that existed across the continent. Both terms aim to honor and recognize the first inhabitants of America, highlighting their significance in the country's history.

The other options fail to capture the full picture. Whereas "Colonists" refers specifically to European settlers who arrived in America after the indigenous peoples, this group does not represent the original inhabitants. Thus, recognizing both "American Indians" and "Native Americans" accurately reflects the history and presence of the native peoples prior to European arrival, supporting the answer that includes both terms.