Please help me I'm desperate What forces cause conflict within and between societies?
and if you can,
what is the one force, out of these listed, that you think is the most significant cause of conflict -in the 20th century-? (specifically the 20th century)
and please give reasoning, it doesn't have to be long

Pls thomas jefferson believed that the french revolution and the reign of terror, a. should be exported to the rest of europe. b. would bring the united states and britain closer together. c. we’re understandable yet regrettable responses to the excesses of french monarchy. d. we’re not particularly important developments.