Which of the Following Companies Is Utilizing Social Media in Customer

Which of the following companies is utilizing social media in customer service?

A) A retail store has a box on the check-out counter where customers can leave comments and suggestions.
B) A business e-mails customers order tracking information so they can track the delivery of their orders.
C) A company institutes a 24-hour customer service hotline for customers to call with questions.
D) A company's website has a section where customers can e-mail questions.
E) A company encourages customers to use its Facebook page to ask questions or request product samples.