Which scenario best illustrates how the power to make treaties in the united states constitution provides for checks and balances among the three branches of government?
a)the president must sign an executive agreement without the senate, but must have approval of the house and the supreme court.
b)the senate must approve a treaty by a two-thirds vote, and its terms must be found to be constitutional by the supreme court.
c)the house of representatives must approve the treaty by a two-thirds vote, but it can be voted by the president or found unconstitutional by the supreme court.
d)the supreme court must decide whether the treaty is constitutional but congress can override the court with approval of the president.

i think the answer is b. if someone knows it, can they explain?