Answer:
(A) growing numbers of native-born white women worked in offices.
Step-by-step explanation:
The Progressive Era was a period of social activism and political reform across the US. Progressivists wanted to end political corruption, improve the lives of individuals and protect citizens.
During this period there was a rise in the participation of women in social and political movements. Because of that a large number of native-born white women that started to work in offices and participate more in society.