Final answer:
According to the 2015 National Assessment of Educational Progress, 23% of fourth-grade students scored 'basic' or 'below basic' in reading nationally, with African-American and Hispanic students making up a disproportionate amount.
Step-by-step explanation:
The correct option is b. 23% nationally, with African-American and Hispanic students making up a disproportionate amount.
In the 2015 National Assessment of Educational Progress, 23% of fourth-grade students scored 'basic' or 'below basic' in reading. This percentage is the national average for all students.
African-American and Hispanic students make up a disproportionate amount of this percentage, indicating that these student groups are more likely to score 'basic' or 'below basic' in reading compared to their white peers.