In the years immediately following the introduction of school desegregation in the United States and the passage of the Civil Rights Act of 1964, White Americans expressed diminishing racial prejudice. According to the text author, this best illustrated the impact of:

How can behavioral science be applied in improving public health? a.by tracking a disease to determine its sourceb.by creating promotions that improve health habitscboth by tracking a disease to determine its source and by creating promotions that improve health habitsd.neither by tracking a disease to determine its source or by creating promotions that improve health habits