Option D is the correct answer. The provided text explicitly states that the declaration on the disintegration of the USSR led to the formation of the Commonwealth of Independent States (CIS), making option (b) a valid outcome. The text also notes that the collapse had "profound consequences for world politics," which implies a change in the balance of power and the end of the systemic conflict, covering options (a) and (c). However, the text mentions the "Soviet invasion of Afghanistan" only in the context of a chronological timeline (Question 2), implying it was a preceding event, not an outcome of the disintegration. Therefore, Crises in the Middle East is not identified as an outcome in the given context.