They are talking about B because no one knows what the future will be like. hope this helps! Everything other than b is not true becuase they are past events, the future has not happened.
<h3>Answer: </h3>
Marie Curie was the scientist whose private papers had to be decontaminated for two years in the 1990's before being put on file at the National Library in Paris. Marie Skłodowska Curie was a Polish and naturalized-French scientist and chemist who escorted pioneering analysis on radioactivity. She said that being a historian is not without its jeopardies.
It would be A I hope this helps
Answer:
Trade
Explanation:
Trade because as more people started trading the more people stay because they practically had an unlimited supply of trade goods like food, crops, spices, etc.
Their land was good for power and good for agriculture.
