a. the appeal of Christianity among all social classes of Europe.
Generally speaking war and military build-up help the economy of a country by lowering "<span>unemployment," since many people are able to find jobs that allow the nation to mobilize. </span>
Geologists have divided Earth's history into time units,
which are largely based on fossils.
Fossils<span> are the
preserved remains or traces of animals, plants, and other organisms from the
remote past.</span>
The correct answer between all
the choices given is the second choice or letter B. I am hoping that this
answer has satisfied your query and it will be able to help you in your
endeavor, and if you would like, feel free to ask another question.