The Japanese attacked Pearl Harbor for the main reason of tension in the Pacific. The Americans weren't necessarily in the conflict at this point, but were sitting in the Pacific watching the Japanese, if the Japanese were to grow in power, they can't have the Americans on their tail. The attack counterattacked the Japanese if you really look at it. Most people would relate the Pearl Harbor attacks as "poking the sleeping bear with a stick", and that's true. We turned the fighting back to the Japanese in the months after the attack. And four long years later, we dropped the "Little Boy" atomic bomb on island town of Hiroshima -- And the second bomb called "Fat Man" on Nagasaki 3 days later. The Japanese surrendered less than a month after the bombings. So, the attacks of Pearl Harbor really hurt the Japanese more than it hurt the Americans.
Answer:
Standard Oil became a horizontal integration monopoly because it owned ninety percent of US oil refineries. It became a monopoly because it bought almost all of the competitors so that it managed to control almost all oil production, processing, marketing, and transportation in the United States.
The above system of United States Constitution is showing three organs of the state i.e Legislative branch, Executive branch and the Judicial branch.
And below each division, their works are given. Aswecan were that, each of the organ is at same height which shows that they are practicing equal powers and they don't interrupt in each others work.
They practice the system of <u>Checks</u><u> </u><u>and</u><u> </u><u>Balances</u> to ensure that none of the organ is enjoying and grabbing too much.
So, the most appropriate option is:

Checks and balances system.
And, we are done !!
#CarryOnLearning...
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<span>D. Anti-Federalists were suspicious of a strong central government</span>
The answer is D I believe