It would be "party leadership" that is the most common party system in the world today, although it should be noted that there are still many unitary and dictatorship-based governments.
Since the crash, Hoover had worked ceaselessly trying to fix the economy. He founded government agencies, encouraged labor harmony, supported local aid for public works, fostered cooperation between government and business in order to stabilize prices, and struggled to balance the budget.
Answer:
I would say that the answer is d.
Explanation:
"The case went before the U.S. District Court in Kansas, which agreed that public school segregation had a “detrimental effect upon the colored children” and contributed to “a sense of inferiority,” but still upheld the “separate but equal” doctrine." provided by https://www.history.com/topics/black-history/brown-v-board-of-education-of-topeka
