The purpose of the yalta conference was met as leaders from the united states, soviet union and great britain met to discuss a post-world war ii peace.
In this yalta conference aftermath the WWI, the countries met to decide what would happen to Europe and Germany after countries were freed from Nazi rule.
Hence, the countries that includes united states, soviet union and great britain met to discuss a post-world war ii peace.
Therefore, the Option D is correct.
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