Which of the following is true of sales messages sent through direct mail?

A) They are considered less invasive by most consumers than telephone calls or unsolicited e-mail messages.
B) Direct mail is an effective channel for personalized messages.
C) Tangible mail has been shown to have greater emotional impact than virtual mail.
D) All of these are true of sales messages sent via direct mail.

Direct mail is often seen as less invasive than telephone calls or unsolicited emails, allowing for a more positive reception among consumers. It also offers a unique channel for personalized messages, which can be tailored to the recipient's interests or needs. Additionally, tangible mail can create a stronger emotional impact compared to virtual mail, as the physical act of receiving and handling mail can enhance the message's effect.