The true statements among the options provided are:
- There are substantial racial disparities in household income in the United States.
- White people have the highest average household income in the United States.
These statements reflect the ongoing and significant income inequality along racial lines in the U.S. The claim that racial disparities in income have narrowed considerably over the last 50 years is more complex and may depend on specific metrics, but it is widely acknowledged that significant disparities still exist.