First came the Zollverein (Toll Union) in 1833 that, by abolishing tolls between the various German principalities, made Germany into a common market. For a period of decades, until about 1860's, there were attempts at imitating in Germany the industrialization that had taken place elsewhere in Europe.
I think it is D: the spread of the Roman Catholic Church.
The human activity most widely viewed as changing the planet is the burning of fossil fuels. ... to melt, threatening water supplies for hundreds of millions of people. ... and phosphorus to the biosphere than would occur naturally. ... compounds that can remain active in the environment for thousands of years .
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All people could see the laws.
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