How many three-digit numbers can you create using the digits $$3$$, $$0$$, and $$7$$, and using each digit only once? ($$1998$$ Math Kangaroo Problems, Level $$3-4$$, Question \#$$6$$) 
选项为:A:$$2$$  B:$$3$$  C:$$4$$  D:$$5$$  E:$$6$$  请回答其中一个选项.