to end its participation in world war i, russia negotiated the peace agreement. declaration of neutrality…

to end its participation in world war i, russia negotiated the peace agreement. declaration of neutrality brest - litovsk zimmermann lusitania
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Brief Explanations:
In 1918, Russia negotiated the Treaty of Brest - Litovsk to end its participation in World War I. The Declaration of Neutrality is not related to this event. The Zimmermann Telegram was an attempt by Germany to get Mexico to ally with it against the US. The Lusitania was a British ocean - liner whose sinking contributed to the US entering World War I.
Answer:
B. Brest - Litovsk