Answer:
Missionaries I'm pretty sure
Explanation: i remember learning this sorry for a bad explanation.
The countrys wanted to compete against each other for power/dominace
A. Bus boycotts in Montgomery, Alabama
D. Ratificación of the 13th, 14th, 15th amendments
<span>First Transcontinental Railroad -
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Here's a link that should give you all of the information you need about the transcontinental railroad.</span>