17. Native American burial sites dating back 5,000 years indicate that the residents of Maine at that time were part of a widespread culture of Algonquian-speaking people.
原句正确,但是很多讨论中都是将做文化解,结果变成人是文化,都不敢选A。下面是Longman Dictionary of Contemporary English的解释。
Culture n.
[countable] a society that existed at a particular time in history This technique was then adapted and refined by the more sophisticated cultures of the ancient world.