How does the author use information from sources to support their opinion and convince readers?

  ! i need it ! the daughters of the revolution eventually admitted african american to their hall.which best analyzes how this detail supports the meaning in "marian anderson sings"? a)it shows that african american performers would never be able to perform in some theaters. b)its show that an era of discrimination on unfair treatment of african american was finally over. c)it shows that marian anderson had ease discrimination for for african american performers. d)its shows that revolutionaries are not open to new ideas.

Accepted is to fact as unproven is to

What statements best describes king's purpose in writing the letter?