During the cold war, nations that adopted a
policy of nonalignment believed they should
(1) be exempt from united nations decisions
(2) restrict trade with neighboring countries
(3) reject international environmental treaties
(4) follow a course independent of the superpowers

(4) follow a course independent of the superpowers

Explanation:

The Movement of Non-Aligned Countries (MPNA or MNOAL) is a grouping of States formed during the Cold War, the geopolitical and ideological world conflict of the second half of the 20th century that manifested itself with the indirect confrontation between the Soviet Union and the United States . The purpose of the MPNA was to maintain its neutral position and not to ally with any of the superpowers already named. Although the Berlin Wall has fallen (November 9, 1989) and the USSR has been dissolved (1991), the organization remains in force.