According to Prof. H.L.A. Hart:
A. Law is a union of primary and secondary rules.
B. The idea of obligation is at the core of a rule.
C. Law is the enterprise of subjecting human conduct to the governance of rules.
D. The primary rules acquire the unity of a system through their union with secondary rules.
Choose the correct answer from the options given below:

Correct option is C

Prof. H.L.A. Hart, a leading legal positivist, proposed that:

(A) Law is a union of primary rules (which impose duties) and secondary rules (which confer powers, such as rules of recognition, change, and adjudication).
(B) He emphasized that the idea of obligation is central to understanding legal rules, especially from the internal point of view.
(D) He argued that primary rules acquire systematic unity through their union with secondary rules.

Statement C (“Law is the enterprise of subjecting human conduct to the governance of rules”) is attributed to Lon L. Fuller, a natural law theorist, not Hart.