What caused russia to exit world war i in 1917?
a. the death of the czar
b. a revolution within russia
c. a surprise invasion by poland
d. the bankruptcy of the russian treasury

It can be inferred that the dramatic increase in defense spending by germany was the result of. (a) attempts by great britain to take german colonies. ( b) fear of a two-front war against france and russia (c) the need to put down a communist rebellion (d) a competition with the allies to produce atomic weapons