Step 1:
Arthashastra literature deals with polity, economics, and administration.
Step 2:
Kautilya is the most famous author of Arthashastra.
Step 3:
Brihaspati is also associated with Arthashastra tradition.
Step 4:
Thus, the correct answer is:
\[
\boxed{\text{(3) C and D Only}}
\]