The Lausanne Peace conference of 1922-1923 was organized to formally end WWI after Turkish victory over Greece in Anatolia. The main players in the Lausanne Peace conference negotiations were Turkey and Britain. For their part, France and Italy joined for economic reasons. Greece was too weak to have an effect on the outcome of the negotiations. The Soviet Union participated in the conference for strategic reasons. It was invited by Turkey in order to counter balance Western European influence on the negotiations. Japan attended the conference due to its interest regarding the Straits. The US was an observer to the peace negotiations in Lausanne as it was not part of the War of Independence.

The main players in the Lausanne Peace conference negotiations were Turkey and Britain, not Germany and Turkey. The correct answer is B.