can anyone explain

With diamonds, as with all gems, one should ask for a written description of one’s
purchase; the description may prove useful later if you have reason to believe the
jeweler misled you.
(A) one should ask for a written description of one’s purchase
(B) you should ask for a written description of your purchase
(C) a written discretion of your purchase is what one should ask for
(D) a written description of one’s purchase is what should be asked for
(E) a written description of your purchase is what should be asked for