What could Percy hear across the four lanes of traffic?

Hi brothers and sisters may you tell me the answer of question ?

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

Look at these frames from iqbal. which best describes the author's purpose in these frames of iqbal? to describe to the reader what happened at the wedding to show iqbal's pain and confusion after his debt increased to inform the reader about how iqbal escaped from the factory to persuade the reader to pay off the debt of child laborers mark this and return