In the Week $10($international relations$)$ lecture, how was the 'survival' aspect of realism characterized in international relations?

A$.$ Survival is guaranteed through adherence to international norms and laws

B$.$ Survival depends on a state's ability to form alliances with stronger states

C$.$ Survival is not guaranteed under a system of anarchy, prompting states to be self$-$reliant

D$.$ Survival is primarily dependent on a state's economic strength and wealth