PLZ HELP ASAP THIS IS NOT MULTIPLE CHOICE Which statement about the when the Turks joined German and Austrian forces to drive the Russians back into Russian territory is true?

It happened on the Western Front in early 1915.

It happened after the Russian decision to avoid World War I.

It happened in response to the growth of German alliances.

It happened on the Eastern Front in early 1915.

alliances in ww1 were different from ww2 because the entente in ww1 made up of serbia,russia,france,britan,japan and italy later america  and all allied in a sort of balance of power and too keep germany,austria-hungary,and the ottomans down. russia allied the serbians in order to exert its influence in the balkans while france allied the russians because france was still in dismay and insulted after the defeat to the germans during the unification of germany and britian allied the belgians after the germans invasion of belgium.in ww2 the alliances were in a preemptive attempt to deter any further wars into happening while germany and italy allied since they were insulted and humiliated after the previous war while also sharing a similar ideology of facsim along with japan which all 3 had a want for world domination and agreed to assist one another in the endevours 

explanation:

no every country is held to the same degree as others just some member countries such as the usa and germany are more economically sound so the need to show there support to all others