Any doctor who is confident about what medication is appropriate to treat a certain disease will prescribe it without consulting a formulary. Likewise, every doctor who is sure that a given medication is not appropriate will not prescribe it, and again a formulary is not needed. Therefore, formularies are useless for doctors when it comes to selecting medications.
Which of the following best identifies the flaw in the argument?
(A) The argument does not consider the possibility that doctors can use formularies for something other than selecting medications.
(B) The argument does not consider the possibility that people other than doctors can benefit from using formularies.
(C) The argument infers from the fact that a doctor is sure what medication is appropriate to cure a certain disease that the doctor will also be sure about what medication is not appropriate.
(D) The argument overlooks the possibility that doctors might use medical references other than formularies in selecting appropriate medications.
(E) The argument fails to consider situations in which doctors are not confident.