Final answer:
The statement about poor blacks in the South and workers uniting for fairer treatment under the law aligns with the views of Civil Rights Activists, as these individuals and groups fought for racial equality and social justice in the United States, often working to eliminate racial inequalities and promoting civil rights for all (A).
Step-by-step explanation:
The viewpoint that poor blacks in the South and workers throughout the United States should work together to get fairer treatment under the law would most align with the perspectives of Civil Rights Activists. This is because during the Civil Rights movement, grassroots activism played a pivotal role in advocating for equal rights and treatment. Civil Rights Activists worked tirelessly to eradicate systemic racial inequality and social injustices across the nation, including in the workplace and within societal institutions.
Throughout the 1960s, the federal government, influenced by activists' campaigns and the broader geopolitical climate of the Cold War, improved its efforts to protect civil rights. The African American Civil Rights Movement, with leaders like W. E. B. Du Bois, fought for immediate and equal rights as opposed to the more gradual approaches endorsed by others like Booker T. Washington. Several organizations and individuals, including the NAACP, worked to challenge segregation and discrimination legally and socially.