Select the appropriate answer with regard to social constructivism.

1: Social constructivism assumes that states are the only actors that matter in international relations.

2: According to social constructivism, the international system is not solely driven by power struggles but also by shared ideas and norms.

3: Social constructivists argue that state behavior is predetermined by fixed, unchanging factors.

4: In Social Constructivism, the role of non-state actors, such as international organizations and transnational advocacy groups, is acknowledged as significant.