All of the following justify the contention that the period 1917–1922 marked
the beginning of a new period in Russian history EXCEPT

. political or economical policy that isolates a country from participating in international relationships. it has been suggested that the united states participates in isolationism because of its lack of involvement in particular wars or alliances.

c. troops marched forward in close formation against newer, more accurate weapons

the answer would be a).