Concept: Jeremy Bentham was an important jurist associated with legal positivism and utilitarianism.
Step 1: Check Positivism.
Bentham is associated with analytical positivism because he separated law as it is from law as it ought to be.
\[
A = \text{Associated with Bentham}
\]
Step 2: Check Utilitarianism.
Bentham is strongly associated with utilitarianism, especially the principle of greatest happiness of the greatest number.
\[
D = \text{Associated with Bentham}
\]
Step 3: Reject Living Law.
Living Law is associated with Eugen Ehrlich, not Bentham.
\[
B = \text{Not associated}
\]
Step 4: Reject Legal Realism and Rule of Recognition.
Legal realism is associated with realist jurists, and rule of recognition is associated with H.L.A. Hart.
\[
C,\ E = \text{Not associated with Bentham}
\]
Therefore, the correct answer is:
\[
A \text{ and } D \text{ only}
\]