Which of these choices are true about isolationists in the u. s.? they believed the u. s. should remain uninvolved in world affairs. they opposed the league of nations. they opposed article x (article 10) because it required league members to defend each other in case of attack. all of these choices are true about isolationists.

The correct answer for this question is "All of these choices are true about isolationists." The idea about isolationalists in the US includes:
(1) They believed the U.S. should remain uninvolved in world affairs
(2) They opposed the League of Nations.
(3) They opposed Article X (Article 10) because it required League members to defend each other in case of attack.