Which of the following would be considered illegal, according to the General Data Protection Regulation? a. A retailer sending a marketing email to target audiences that are on its list of current customers, but the email does not provide a link to the retailer's data collection policy. b. All of these would be illegal, according to the General Data Protection Regulation. c. A website tells visitors that, by continuing through the site, the visitors are accepting the website's data collection policy instead of asking the visitor specifically for his/her consent. d. A retailer paying for targeted advertising on a social media site