The first lady of the United States gives a speech to a group of students about the importance of healthy eating. The speech comes less than a week after a study found that U.S children are unhealthier than children in other countries. which statement best describes the context of the first lady's speech?

A. The country is concerned that American children aren't smart.
B. The country is concerned the children in other countries aren't healthy
C. The country is concerned about American children's performance in school.
D. The country is concerned that American children aren't healthy