Which of the Following Statements About Communications and the Service

Which of the following statements about communications and the service marketing triangle is true?

A) External marketing communications include advertising,public relations,personal selling and sales promotions
B) The sides of the service marketing triangle are customers,providers and the company
C) Interactive marketing communications are exemplified by vertical and horizontal communications
D) All communications methods that relate to the service marketing triangle are either verbal or print
E) Service encounters are an example of internal marketing