Which sentence does not contain any errors in comma usage? a. mom is someone, who knows how to ski well. b. allan is walking with the man who wears bermuda shorts in winter. c. here is the boy, who will rake the leaves in our yard. d. dad is the one, who can answer your 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