The importance of social changes and reform in the late 19th and 20th centuries

i used to know but i learned it a long time ago sorry

explanation:

it was on the rise and doing very well and would continue to do well until the great depression from 1929-1939

a causal relation between two events exists if the occurrence of the first causes the other. the first event is called the cause and the second event is called the effect. a correlation between two variables does not imply causation.

explanation:

the viking voyages took place during the middle ages, which was about this time. 500 to 1350. the viking voyages took place during the middle ages, which was about this time.