Explanation
A broker-dealer must deliver a final prospectus to a client who is purchasing a security either on or prior to the confirmation due date. The margin agreement need not be signed until after the initial transaction takes place.
The hypothecation agreement is part of the margin agreement. As an alternative, a preliminary prospectus can be provided, but it must be accompanied by additional information that is contained in the final prospectus, but is missing from the preliminary prospectus. Therefore, Choice C, as written, is not correct.