La Guerra Civil ha dejado secuelas y heridas profundas hasta hoy día. Fue uno de los capítulos mas tristes, complicados y difíciles que le ha tocado vivir a la nación estadounidense.

geography

this is because warmer climates often don't get people sick from the flu and regions where it was often colder more people received the flu. hope this if you need more reasoning i am here to

the answer should be a. the sui empire, the tang empire extended from korea in the west to manchuria in the east.

b europeans take corn to africa. corn becomes an important crop there.

i believe it would influence their own way of understanding things. it shall be a foundation where they can draw or start an argument.   historians are also  scientists that  have their tools of analysis and expertise to unlock a variety of difficulties such as relationships of man, origin, politics, economy, and culture. based on facts and understanding on these areas, they may shade light to extract ideas and develop options to validate a hypothesis or debunk it.