The first one is the answer
1. Universe
2. Milky way galaxy
3. Solar system
4. Earth
hope this helps :)
B I think it a or c or d lol I don’t know
This is of course a very complex question that does not have a definitive answer, but 1850s would be a good decade to start counting as "Modern". This was a decade of the telegraph and Darwin's The Origin of Species.
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