Three-digit:$$139$$, $$193$$, $$319$$, $$391$$ , $$913$$, $$931$$ for a total of $$6$$. 
Using the digits $$1$$, $$3$$, and $$9$$, we can form~\uline{~~~~~~~~~~}~different 3-digit numbers without repeating digits. 

(A) $$3$$ 
(B) $$4$$ 
(C) $$5$$ 
(D) $$6$$ 