Which of the following activities is permitted during the cooling-off period of an initial public...

The cooling-off period begins after the registration statement is filed with the SEC and lasts for at least 20 days. During this time, the issuer and underwriters can market the securities but cannot finalize sales.

D is correct because marketing (e.g., roadshows) is permitted during the cooling-off period.

A is incorrect because the final prospectus is distributed after the offering is effective.

B and C are incorrect because sales and deliveries are prohibited until the registration becomes effective.