What is the author’s purpose in the above passage, and how does he achieve it through his organization and choice of details?

Is the use of another person exact words

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

The assignment for this lesson is to write a draft of an argumentative research essayabout the american dream that's based on your outline from lesson 1.