Final answer:
The West region was the most open to women's suffrage, granting full suffrage to women before 1919. The South region, on the other hand, was the least open to the idea of women's suffrage.
Step-by-step explanation:
The West region was most open to the idea of women's suffrage in the United States. Prior to 1919, states such as Washington, Oregon, California, and Nevada had granted full women's suffrage. These states were progressive in their thinking and were more likely to support women's rights. On the other hand, the South region was the least open to women's suffrage, as they were more traditional and resistant to change.
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