A city ordinance prohibits the owners of dogs from allowing dog poop to remain in the owner's yard for more than 48 hrs, and sets forth the procedure by which the poop must be disposed of as follows. "Dog poop shall be raked up with a metal rake and deposited into a plastic trash container using a steel shovel." Such ordinance is:

A) Private procedural law.

B) Public procedural law.

C) Private substantive law.

D) Public substantive law.

E) None of the above.