Which of the following method was adopted by the countries of the North during the cold war to ensure a steady flow of resources?

All of the above.

Throughout the Cold War, the industrialized countries of the North adopted a number of methods to ensure a steady flow of resources.  These included the deployment of military forces near exploitation sites and along sea- lanes of communication, the , efforts to prop up friendly governments in producing countries, as well as support to multinational companies and favorable international agreements. Traditional Western strategic thinking remained concerned with access to supplies, which might be threatened by the Soviet Union.