听力原文：A new survey indicates that American Internet users are becoming more concerned about whether they can trust online material. Declining trust can be seen in the wide variety of ways that people use the Internet. From the obvious -- like spam offering dubious medicine or get- rich-quick schemes -- to the confusing or non-existent privacy policies of many websites -- the Internet has become scary enough to have affected Internet use.
Which item is not concluded in this passage about declining trust of online materials？

A. Offering large amount of junk mails about dubious medicine.
B. Spreading schemes of being overnight millionaires.
Confusing privacy policies of many websites.
D. Rooting bank accounts.