Students $$A$$, $$B$$, $$C$$, $$D$$, $$E$$ and $$F$$ are standing in a row. We know that:  $$\quad \quad \quad 1$$) $$D$$ is standing between $$E$$ and $$F$$;  $$\quad \quad \quad 2$$) $$C$$ is standing between $$D$$ and $$E$$;  $$\quad \quad \quad 3$$) $$B$$ is standing between $$C$$ and $$D$$; and  $$\quad \quad \quad 4$$) $$A$$ is standing between $$B$$ and $$C$$.  Which of the folowing statements is true? 
选项为:A:$$A$$ is positioned either at the right end of the row or the left end of the row.  B:$$A$$ is second from one of the ends of the row.  C:$$A$$ is third from one of the ends of the row.  D:The situation described in the problem is impossible.  E:$$E$$ and $$F$$ are right next to $$A$$.  请回答其中一个选项.