The work of dorothea dix in the 1800s was an example of the

a. religious fervor in american society.
b. increased desire to reform american society.
c. growing opposition to the practice of slavery.
d. increased emphasis on moral behavior.

don't guess just to get the points

b.increased desire to reform American society.

Explanation:

Dorothea Dix was one example of many middle-class women who devoted themselves to improving the quality of life in American society. She worked hard on behalf of the mentally ill in the United States in the mid-1800s. Via a strong political manifestation, she convinced legislatures in different states to allocate public funt to build hospitals for the intellectually ill.  

c. free trade can lead to low pay for workers in poorer countries.

the crusaders are identified in the painting;

c. by the red crosses on their backs