Hello I have a question that refers to public health administration. My question is : Community constituencies of a local health department LHD...

Hello I have a question that refers to public health administration. My question is :

Community constituencies of a local health department LHD include

a. The landmass any geographic region served by the LHD

b. Public school teachers in local school district .

c. Laws and policies governing the county .

d. All the above .

Which answer best for this question.I have an idea which one it is but I just want to doublecheck. I really appreciate thank you so much