Which statement about direct$-$mail messages is most accurate? A $)$ Direct mail is an effective channel for personalized, tangible$,$ three$-$dimensional messages that are less invasive than telephone solicitations B $)$ Today's companies no longer send direct$-$mail messages to market their products or servicesthey rely exclusively on electronic media instead Directmail marketing is less effective than online marketing D$)$ All answer choices are accurate statements about direct$-$mail messages $.$