Answer:
The correct answer is: OC. "Although her gift for music was evident early on, she was turned down by several white voice teachers and an all-white music school, where she was not allowed to even submit an application." (paragraph 6)
Step-by-step explanation:
This evidence from the passage is most relevant to the statement that "The exhibit makes clear that her many achievements and 'firsts' were instrumental to the struggle." The evidence highlights Marian Anderson's struggles and challenges as an African American artist facing discrimination in pursuing her musical career. It underscores how her achievements and "firsts" were significant in the context of the struggle against racial discrimination and segregation, making her accomplishments even more remarkable and important.