Which two sentences in this excerpt from the autobiography

In the por "heaven" what things does echo say will last?

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

In the great gatsby, daisy is described as