It means they don't want their name or face to be revealed to the public. They may want this to protect themselves and their family.
I would say B they were destroyed
It decreased and very significantly so!
Most of native Americas died of diseases brought by Europeans; but some were also killed directly by the Europeans. Many also mixed with the Europeans (by marriage or rape...) so there was also a mixed indigenous-white population.
ps. C and D is essentially the same answer
Option C
The peer review process, in which scientists submit write-ups of their ideas and experiments to a set of colleagues who judge how good the ideas are before the ideas can be published, is: A useful and important, even if imperfect, mechanism of quality-control for the scientific literature
<u>Explanation:</u>
The peer-review practice endures to approve scholarly work, accommodates to enhance the worth of proclaimed research, and builds networking circumstances in research areas. Notwithstanding critiques, peer review is yet the unique internationally affirmed system for research validation.
Peer review guarantees that documents undergo a fair evaluation and skillful opinion, enabling scholars to develop their script and therefore high-quality experimental interpretation and articles to be proclaimed. It also encourages the browsers to believe the scientific uprightness of the report and to present notified declarations where peer reviewer comments are ready.
