Answer:
governor of the state.
Explanation:
An economic development plan for a US metropolitan city would most likely be created by the governor of the state.
This is because, as the governor, he is in charge of the planning, administration and control of the state which means he has to make plans for the economic development of the city.
The roaring twenties happened
egocentrism
racism
So scientists can come up with new inventions
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