Technically, the country was ruled by the Republic of China, but the military dictatorship had been growing immensely by that point.
One example is the dred Scott case. They said that African Americans were considered property.
Displacement is the word we use for the distance covered so in this case when a car travels 20 meter east in 1 second, at the end of that 1 second interval a car travels a distance of 20 meter.
And the distance covered is the displacement, so it means that displacement of the car after 1 second is 20 meter east.
There also people that think WW1 was the first modern war.
But the reason for people to believe that the fist modern war was the civil war is because it was the first war after the industrial revolution, that also meant more technology and advancement were made, and last it was because these new technology's resulted in more deaths than any other American war.
I think this is A yep A is your answer