How many different three-digit numbers can we make that have three different digits using the digits $$1$$, $$2$$ and $$3$$? ($$2009$$ Math Kangaroo Problem, Level $$1-2$$, Question \#$$24$$) 
选项为:A:$$3$$  B:$$6$$  C:$$8$$  D:$$12$$  请回答其中一个选项.