Which of the Following Statements Concerning Kochʹs Postulates Is FALSE

Which of the following statements concerning Kochʹs postulates is FALSE?

A) The suspected pathogen may not be present in all cases of the disease being studied.
B) Kochʹs postulates cannot be used to demonstrate the cause of all diseases.
C) Kochʹs postulates involve the experimental infection of susceptible hosts.
D) All of Kochʹs postulates must be satisfied before an organism can be shown to cause a particular disease.
E) A suspected pathogen must be able to be grown in the laboratory.