Which of the following actions comes under the guidelines concerning communication with the public?

I. Posting an internal memo giving sales tips to registered representatives
II. Distributing a letter to all clients regarding a new mutual fund family
III. Distributing copies of a magazine article about investment opportunities to existing customers only
IV. Calling a client to discuss a new investment strategy

A) II and IV
B) II and III
C) I and IV
D) I and III