In Which of the Following Cases Would an Organization MOST

In which of the following cases would an organization MOST LIKELY be required to follow both ePrivacy and data protection rules?

A) When creating an untargeted pop-up ad on a website.
B) When calling a potential customer to notify her of an upcoming product sale.
C) When emailing a customer to announce that his recent order should arrive earlier than expected.
D) When paying a search engine company to give prominence to certain products and services within specific search results.