Which of the following statements is true?

a. Racial disparities in income in the United States
have narrowed considerably in the last 50 years.
b. There are no racial disparities in income in the
United States.
c. There are substantial racial disparities in
household income in the United States.
d. White people have the highest average
household income in the United States.

c. There are substantial racial disparities in household income in the United States.