Why is 1930's a significant year to canada

Canada was hit hard by the Great Depression. Between 1929 and 1939, the gross national product dropped 40% (compared to 37% in the US). Unemployment reached 27% at the depth of the Depression in 1933. Many businesses closed, as corporate profits of $396 million in 1929 turned into losses of $98 million in 1933. Families saw most or all of their assets disappear and their debts became heavier as prices fell. Canadian exports shrank by 50% from 1929 to 1933. Worst hit were areas dependent on primary industries such as farming, mining and logging, as prices fell and there were few alternative jobs.

The answer would be option a , b, and c.