What is needed at the beginning of sentence 42 O a first-person pronoun
O a third-person pronoun
O a sequence word or phrase
O a time word or phrase

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