Final answer:
The NAACP was formed in response to the unsatisfactory conditions faced by African Americans and became a major civil rights organization.
Step-by-step explanation:
The major civil rights organization that was formed in response to the unsatisfactory conditions faced by African Americans is the National Association for the Advancement of Colored People (NAACP). It was founded in 1909 as a result of the efforts of the Niagara Movement, a group of African American leaders who came together to address issues of racial inequality. The NAACP became the foremost civil rights organization in the United States and played a significant role in advocating for equal rights and combating racial discrimination.