Which research source would be best for tracking a sailing route across the florida keys?

Can someone explain this to me clearly plz

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

3. cite evidence the author cites several statistics in the section "why protest? "what are some of these statistics, and what is their function in the document?