Question: As Cold War tensions declined, which three international issues emerged as new interested in the field of peace studies?
A: Global environmental issues and their potential to limit economic expansion; the economic dependence of newly independent post-colonial states; and the Vietnam war.
B: Economic security in the globalised international arena; localised environmental issues that potentially limited industrial expansion; and the Vietnam war, particularly in its capability to act as a drain on military and economic resources of the U.S.A.
C: Primarily, the potential for a breakdown in détente and the subsequent escalation of Cold War tensions, leading to a focus on maintaining peace and the negotiations between East and West; secondly, a focus on the impacts of the Vietnam war that stems from this concern; and finally, a study of the development of post-colonial states.
D: The economic prosperity of newly independent post-colonial states; global environmental issues; and the emergence of new security threats in de-escalation of Cold War tensions.
Answer: Let's think it step by step.