This refusal by the Senate to approve the treaty is an example of... international relations

rule of law

executive veto

checks and balances

D) Checks and balances.

Explanation:

Checks and balances are instated by a government to limit the amount of power a branch has on another by giving the other branches the ability to "check" and act on the other for a fair government. International relations would deal with standings with other countries, nations, or kingdoms, while executive veto is the power of the President to deny any bill that has been passed. But since this example doesn't describe Wilson vetoing anything, it can't be C. Rule of law is saying that anyone, no matter how much power, wealth, title or status you have, everyone is bound to the law. The option left is D, because the Senate is "limiting" the authority of the executive branch (a president and his cabinet) by refusing to approve the Versailles Treaty. And that's why Wilson and America didn't join the League of Nations.

pepin the short[a] (german: pippin der kurze, french: pépin le bref, c. 714 – 24 september 768) was the king of the franks from 751 until his death. he was the first of the carolingians to become king.[b][2]

the younger son of the frankish prince charles martel and his wife rotrude, pepin's upbringing was distinguished by the ecclesiastical education he had received from the monks of st. denis. succeeding his father as the mayor of the palace in 741, pepin reigned over francia jointly with his elder brother carloman. pepin ruled in neustria, burgundy, and provence, while his brother carloman established himself in austrasia, alemannia and thuringia. the brothers were active in suppressing revolts led by the bavarians, aquitanians, saxons, and the alemanni in the early years of their reign. in 743, they ended the frankish interregnum by choosing childeric iii, who was to be the last merovingian monarch, as figurehead king of the franks.

there has only been 12 presidents. the 12th president is/was moon jae-in