I am pretty sure the answer is B) sedimentation but i could be wrong. i haven't don't this subject in a year. lol
Technology is probably the answer that you need. Other answers such as internet, cell phones, and airplanes are suitable answers as well.
The Rise of Napoleon, and the creation of the second French Republic
Pandemic-the spread of disease across a wide area
Tariff-a tax on imported goods
Global warming-the gradual increase in earth’s average temperature
