The Idea That Change Comes Slowly Can Be Evidenced by What

The idea that change comes slowly can be evidenced by what event during Reconstruction?

A) After the Civil War, most slaves had to wait a long time to escape their masters.
B) Women were excluded from the suffrage amendment.
C) African-Americans were denied membership in churches.
D) African-Americans did not get elected to political offices.
E) African-Americans had no interest in having their own businesses.