Which priority is most important when you plan out access control lists?

Which priority is most important when you plan out access control lists?

A.
Build ACLs based upon your security policy.

B.
Always put the ACL closest to the source of origination.

C.
Place deny statements near the top of the ACL to prevent unwanted traffic from passing through the router.

D.
Always test ACLs in a small, controlled production environment before you roll it out into the larger production network.