Which of the Following Have Been Identified as Valid Uses

Which of the following have been identified as valid uses of a state's police power?

A) Efforts to address threats to the public health and safety, such as fires and unsanitary conditions.
B) Rent control within constitutional limits and efforts to address threats to the public health and safety, such as fires and unsanitary conditions
C) Rent control within constitutional limits; efforts to address threats to the public health and safety, such as fires and unsanitary conditions; and restrictions on off-site advertising signs.
D) Only efforts involving legislation addressing the conduct of police officers both on and off the job because the state's police power is limited to supervision of law enforcement officers within the state's jurisdiction.