Help plz can you match them

A.Precedent
B.The U.S. Constitution
C.Ordinance
D.Regulations
E.Statutes


___ Gives Congress power to establish post offices

___ Laws about the Postal Service made by Congress

___ Laws created by the Postal Service so it can run smoothly

___ Decisions made by courts about any of the laws regarding the Postal Service

___ Laws about what you can and cannot do on the city sidewalks