From our analysis so far characteristics of law in a developed system could be identified as follows: (1) Law is a system or set of rules. These rules are general, universally applicable to all cases that are within the confines of a particular rule; and finally, legal rules are predictable, (2) legal rules are binding; (3) collective enforcement of law is ensured by an authority, say, police or court; (4) depending on the legal tradition laws man made either by the legislature or judges or both. Therefore, the correct answer is D.