The answer is D railroads brought an increase in population, leading to controversies over land usage
The Albany Plan of Union was a plan to place the British North American colonies under a more centralized government.
Answer:
Pythagoras believed that the planets themselves, all heavenly bodies, rang out notes of vibration based on their orbit and distance to each other. We humans simply lack the ability to hear this music of the spheres.
C because it had to do with security of the colonies.