Hi there!
The innovation that had the greatest impact on westward migration was d. transcontinental railroad.
1. disease brought by colonists was a major factor. Kills millions
2. violent conflicts between the colonists and/or British forces against the natives
3. The westward expansion (there's a special name for it) Colonists kept colonizing deeper and deeper into the mainland until reaching the western sea coast. killing 10's of thousands on the way there
*millions died, possible around 10 mill
Answer: the correct option is, She tried to explain to them why none of them could go back to the plantation. If a runaway returned, he would turn traitor, the master and the overseer would force him to turn traitor.”
mark brainliest please