What event allowed Germany to sign a treaty with Russia, ending their campaign in the east?

The historical event that allowed the signing of a peace agreement between Russia and Germany was the Bolshevik Revolution. Marxists took power in Russia in 1917. There was great chaos. The Russian army had performed very badly in the Eastern Front of World War One. In order to keep power and focus on restoring order domestically, the revolutionary government agreed to the drastic terms of peace demanded by the German empire and which meant loss of territory and population, and signed the Treaty of Brest-Litovsk in 1918. It ended the Eastern Front of the war to the consternation of the Western allies.

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i believe the answer is a

depends on the age of the teen, many believe by the age of 16 a person should know the strong difference between right and wrong along with the difference between risky and immediate death. swimming with sharks might be dangerous but swimming with sharks while bloody meat is attached to you is just insane. even more if you have no idea what you're doing. however, no matter the age, as long as the person is skilled enough and has the mental and physical capacity to control their actions doing whatever sport they put their mind to is all that matters.