How did women like Dorothea Dix and Clara Barton contribute to the Union war effort?

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A. They traveled with their husbands to the warfront.
B. They worked as nurses for the Union army.
C. They disguised themselves as men and fought with the army.
D. They took jobs to support their families while their husbands fought.

B. They worked as nurses for the Union army.

The correct answer is B. They worked as nurses for the Union army.