Answer:
The correct answer is the second option: Protecting the privacy of knowing and unknowing customers.
Explanation:
Nowadays the use of the currents social medias is beginning to increase in the area of the marketing and the business world due to the wide range of communication that it can has, that is, the ability of those medias to reach the target audience and therefore to communicate the message established in the marketing mix. Moreover, due to the fact that a lot a people are reached during that process, most of them unknown customers, the most important concern for the companies regarding social and ethical issues is the protection of the privacy of those customers because personal information is given when making a purchase or just signing in the companies' websites.