Answer:
A or C i suck at explaining just trust me
There have been 20 presidents since 1900
D) Gettysburg. It was the most high casualty rated battle of the war. After that battle, the Confederates lost every battle of the war because they lost an enormous amount of replaceable men in that battle.
I think it is the first one (shoppers find sushi...). Cultural diffusion refers to the spread of different cultures around the world. Finding Asian food in America definitely shows an example of cultural spread.
I'm guessing you are talking about the Eastern Roman Empire, or the Byzantine Empire.
the Byzantine Empire a) remained strong for several centuries, until it fail to the Ottoman Turks at ~1346 ad
hope this helps