To what "racial problem is levitt referring

C. Segregation

Civil Rights and Racial Segregation

Explanation:

He was a real estate-developer who act as the president of Levitt & Sons,

Throughout his career, William Levitt has voiced up his opinion regarding the discrimination that being done to African Americans which eventually led to a massive issue in their community.

He openly stated how discrimination and segregation contributed to the housing problems among African american communities.

Most people require some sort of loan in order to finance the purchase of their houses. But financial institutions often require higher interest rates for African Americans citizens compared to white citizens. This force the African American community to live on a less developed area with poor access to health and education.