Which of the Following Uses of Social Media Would Be

Which of the following uses of social media would be most most likely to hurt rather than promote one's business?

A) Studying the users who visit one's Facebook page to detect patterns.
B) Using Twitter to announce special promotions that cater to one's customer base.
C) Offering people ways to use mobile apps to simplify and improve their customer experience.
D) Appealing to the preferences of one's customer base on social media outlets.
E) Making snide comments to undermine one's competition on social media sites.