In the Context of Consumer Privacy, Which of the Following

In the context of consumer privacy, which of the following statements is true of consumers' personal information?

A) Tracking of personal information is done anonymously so that consumers seldom know that it is occurring.
B) Social media companies are legally prohibited from selling the personal information of their users to advertisers.
C) Today's digital marketers have limited access to general demographic data based on age, gender, and income.
D) Digital marketing techniques have eliminated the ethical concerns that were raised during the traditional advertising era.