Which of the following was not achieved by the maya civilazation ?
a. protection from collapse
b. complex social structures
c. monumental architecture
d. systems of writting and math

c, because the american revolution was from 1765 to 1783.

the treaty of brest-litovsk was a peace treaty signed on 3 march 1918 between the new bolshevik government of russia and the central powers (german empire, austria-hungary, bulgaria, and the ottoman empire), that ended russia's participation in world war i.