Which of the Following Statements Is True About Activities Allowed

Which of the following statements is true about activities allowed in connection with a public offering?

A) Generally, the waiting period is twenty days.
B) During the pre-filing period, the issuer may "condition" the market.
C) During the waiting period, the issuer may sell and deliver securities, as long as a prospectus is provided to the investor.
D) After the registration statement is effective, the issuer may sell and deliver securities without giving the investor a prospectus.
E) The post-effective period runs until the issuer sells all of the offered securities.