I think the answer is 4th of July but don't entirely understand the question
The prevailing economic theory of the late eighteenth century was "mercantilism", since this was a time of great territorial expansion that led to goods being trading lucratively all over the world.
In Africa, rising nationalism and communist aid gave rise to wars in Kenya, the Congo and other countries, and even when put down these led to an awareness on the part of European powers that the tide of history was against continued colonisation. Economic cooperation became far more attractive.
Answer:
C) Bering Strait Land Bridge
Explanation:
The Bering Strait Land Bridge theory basically states that the first Native Americans crossed a land bridge created by an ice age in order to get to America.