By learning trades and becoming economically independent
I think the answer is letter B.
Because they were in the past ..they are history today
Explanation:
In 1939, President Franklin D. Roosevelt moved the Thanksgiving holiday one week earlier than normal, believing that doing so would help bolster retail sales during one of the final years of the Great Depression. This led to much upheaval and protest, causing some to deride the holiday as Franksgiving.