Which of the following terms describes the principle that groups of people with shared characteristics, such as language and culture, should be allowed to control their own governments?
a. communism
b. mandate system
c. self-determination
d. russification

C. Self-determination

The principle of self-determination was one of the key features of Woodrow Wilson's 14 Points, which he outlined as ways to bring The Great War (World War I) to an end and work toward a peaceful world. The intention to give people's the right to determine and control their own governments was embedded in sevedral of Wilson's points, such as:

Point #9. Readjustment of the borders of Italy "along clearly recognizable lines of nationality."

Point #10. Austria-Hungary retain a place among the nations, but the peoples of Austria-Hungary should be granted the accorded for independence if they so choose.

Point #12. Turkey shall remain as its own country, but other nationalities under the Ottoman Empire "should be assured an undoubted security of life" and "opportunity of autonomous development."

The "opportunity of autonomous development" (self-determination) wasn't exactly implemented everywhere as Wilson hoped. The "Mandate system" mentioned in the question options was a way in which European powers were entrusted to govern regions that were not deemed ready yet to govern themselves -- such as in former imperial holdings of Germany and the Ottoman Empire.

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.

ok whats to talk about were you scared or what?