Is he trying to hit something??? Of what I think he is

Acomplex sentence contains . one subject and one verb

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

Give a simile of how u look or act. yes it can be you whoever is reading this (but if u wanna do me then im mostly shy and nervous at school)