Traders, Spread by Muslim traders and scholars
I believe A :) Good luck!
Can you reupload the question with an attachment of the picture of the graph?
The Pacific Railroad Act stipulated that the Central Pacific Railroad Company would start building in Sacramento and continue east across the Sierra Nevada, while a second company, the Union Pacific Railroad, would build westward from the Missouri River, near the Iowa-Nebraska border.
True, the disease spread to the Aztecs greatly diminished their population, making them much easier to conquer.
