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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I'm gonna assume you know the story. If not PM me and I can try to explain.
The meaning of the story of Pandora was to explain why their is evil in the world, and was used to teach young children not to let their curiosity get the best of them. But most importantly it also goes along the lines of "curiosity killed the cat, but satisfaction brought it back" because although by opening the box Pandora let out all the bad things we have today, Pandora relied her mistake and closed the box before hope could escape ( if it had escaped the sins would have destroyed it, leaving no good in the world, cause without hope, what good is their?) So although she released all evils, she protected the good, after realizing her mistake.
Hope that helped! PM me if you need me to better explain!
One of the reasons why stock bought on margin is considered a risky investment is because "Investors purchased the stocks with little cash down," meaning that they had to borrow the remained of the money.
(A) the regimes coordinated efforts to seek and provide weapons for use in attacking the United States and its allies