Answer:
people involved - Daniel Burnham,
Louis Sullivan,
Explanation:
inventions that helped - steel technology , escalators and concrete
Answer:
The term "Indochina" originally referred to French Indochina, which included the current states of Vietnam, Laos and Cambodia.
I'm not really sure if you need a broad or detailed definition of the policy, but I'm assuming you want a broad explanation.
The US Policy of Containment was a policy put forth during the Cold War to limit the influence of communism around the globe by attempting to prevent the spread of communism from Russia to other countries around the world. Hope that helps :)
Northerners opposed the act because they thought it was a plot to turn this land into slave states.