Answer:
B) The new railroad made travel faster and easier resulting in accelerated westward expansion.
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Julius Caesar played a role in the decline of the republic in that he caused a great rift between political leaders, but played a role in the rise in that he greatly inspired the people.
Connecting past and present helps you see how humans have chosen to deal with conflict, which can lead to war, political debate, neighborhood riots, discrimination, etc. But also linking past and present helps us see how humans have solved any problems they have come across. Whether it be an economic issue, something that effects many people, or a personal issue.
Nothings shown on my side