The correct answer is C) family resources.
If a seamstress lost her job in 1930, the primary safety net that would have helped get by while she was unemployed was family resources.
The economic situation in the United States in the 1930s was not good at all. People were suffering from the stock market crash that initiated the Great Depression. People lost their jobs, many companies closed, and most of the Banks declared bankruptcy. Unemployed people had no other resource to alleviate their situation than family resources. There were no governmental programs that could help them. President Roosevelt's Social Security Act was signed into law until 1935. That Act created a social security net for unemployed people and elders.