Final answer:
The statement about a racial "split" refers to the Civil Rights Movement, which arose in response to racism and segregation, particularly in the South, and became a prominent force in the fight for African American equality during the mid-20th century.
Step-by-step explanation:
The social issue highlighted in the statement about a racial "split" due to racism and an unsuburbanized South is the Civil Rights Movement (A). This movement emerged largely as a response to the segregation and racial discrimination that African Americans faced, particularly in the Southern United States. Activists strove for civil rights and economic opportunity despite the challenges of pervasive discrimination, disfranchisement, and racial violence. The movement gained national attention in the 1950s and 1960s and became a significant theme in the Southern Literary Renaissance, giving rise to influential writers and fostering cultural unity and growth within African American communities.
Against a backdrop of widespread bigotry and antiquated racial politics, African Americans in the South and across the nation became increasingly determined to pursue equality. The movement for civil rights was multifaceted and included a push for federal anti-lynching laws, targeted protests against discriminatory employment practices, and broader drives for social and economic justice that drew parallel inspirations from other movements, including the women's suffrage movement.