The name of the site is: Hoyo Negr*o
The site is located in the underwater cave of Mexican Yucatan Pennisula. In that site, scientists have found the what they considered as the oldest skeleton in America (which is around 10,000 - 12,000 years old)
In spanish, the site is translated as "the black hole" because it's located in a very scary dark pit.
There were several different ways in which the Spanish organized and managed the new territory they claimed in the new world, but one way was that they quickly set up monarchies.
The answer is D. The separation of the colonies from Great Britain.
Can you post the short story in the comments? I'll be glad to help, i've never read it.
