Which of the following is NOT correct about the introductory stage?

A$)$ The introductory stage consists of the prices falling.

B$)$ The introductory stage consists of the use of sampling and consumers.

C$)$ The introductory stage consists of the use of intensive personal selling.

D$)$ The introductory stage consists of the stimulation of primary demand.

E$)$ The introductory stage consists of the limited distribution.