Answer: c) authority
Step-by-step explanation:
According to theory of Weber, authority is defined as the regulation and laws should be obeyed by certain people through the commands given by authorized party.
According to question, David is obeying the police officers as they are authorized party and thus following their command is a legal duty.
Other options are incorrect because power ,conformity and respect are not the factors that a person obeys as per the superior guidelines and regulation according to Weber theory.Thus, the correct option is option(c).