Which of the Following Ranks Communication Channels from Richest to Leanest

Multiple Choice

Which of the following ranks communication channels from richest to leanest?

A) e-mails, telephone conversation, presentations, face-to-face
B) face-to-face, newsletter, presentations, e-mail
C) e-mail, telephone conversation, presentations, face-to-face
D) face-to-face, presentations, telephone conversation, e-mails