A Manager Who Is a Member of a Self-Managed Team

A manager who is a member of a self-managed team calls his office in Vancouver when he is at a conference in Halifax to retrieve his phone messages by himself without going through his secretary so that he can respond to messages from the other members of his team while he is out of the office.What communication medium is this manager using?

A) A fax
B) Voice mail
C) A memo
D) A face-to-face meeting
E) A blog