Both of the above because is necessary to have the two of them and you cannot have any of Thônes
You forgot to attach the paragraph to your question, so I can’t answer.
Answer:
"If we dig part of a site, we destroy it," said David Hurst Thomas, a curator in anthropology at the American Museum of Natural History in New York. "Technology lets us find out a lot more about it before we go in, like surgeons who use CT and MRI scans."
Explanation: