Which of the following is considered a netiquette?

A) Not sending angry messages by email.
B) Sending people messages containing all the information you think is necessary.
C) Using phrases such as "Please don't hesitate to call".
D) Using all-capitals to emphasize the subject line.

Not sending angry messages by email is considered a netiquette as it is important to maintain a respectful and professional tone in digital communication.

Answer: C
Using phrases such as "Please don't hesitate to call" is considered a netiquette as it shows a willingness to communicate and provides an opportunity for the recipient to ask questions or clarify any doubts.

Therefore, the best choices are A and C.