Which statement is TRUE regarding the use of a "red herring" preliminary prospectus?

A. A preliminary prospectus may be sent to a prospective customer before the issue has entered into the 20 day cooling off period

B. A preliminary prospectus may be highlighted to note important sections

C. The use of the preliminary prospectus constitutes an offer to sell under the Securities Act of 1933

D. The use of the preliminary prospectus does not relieve firms of the responsibility to provide buyers with a final prospectus