Which of the Following Is True of the Courteous Use

Which of the following is true of the courteous use of cell phones?

A) You should use your cell phone at social gatherings to keep in touch with your contacts.
B) You should not turn off the ringer because you might miss important calls.
C) You should connect your cell phone to a headset to place a call when driving.
D) You should place your cell phone on the table while eating.
E) You should call from a quiet place, away from other people.