Which development in Louisiana was most directly impacted by
economic prosperity after
World War II ?

B)-return of republican party control

Explanation:

"The Republican Party has become more competitive in state politics, as evidenced by the election of Republican governors and members of Congress and the state legislature. One Republican, David Duke—an avowed white supremacist and former head of the KKK—was elected to a term (1989–93) in the Louisiana House of Representatives and has run for other state and federal offices"

whose power in the senate is equal to the power of the speaker of the house?

whats the question? im not quite understanding your question.