Answer:
It is important for workers to use care when beginning an archeological dig.
Step-by-step explanation:
This is true, because it is the only one that makes sense. We can eliminate it is a speedy process for archaeologists to identify the type of bones found at a site. and It is not difficult for archaeologists to identify bones as human. because they were not instantly recognized as human, and it took weeks to verify that they were human. It is normal for archaeologists to work alone when digging up fossils. can also be eliminated as this does not relate to the text, is not true, and there were other people assisting in the text. Therefore, It is important for workers to use care when beginning an archeological dig. is the only sentence left, and does make sense as they needed to carefully find the bones, get them gathered up, and then safely have them transported to find out whether or not they are human by a forensic anthropologist.
Hope this helps! :D