Final answer:
To follow proper email etiquette, do not send an email to the entire staff when only certain individuals can answer the question.
Step-by-step explanation:
The answer is sending an email to the entire staff when it would be more effective to send it only to those who can answer the question.
When corresponding to an email, it is important to follow proper email etiquette. One way to do this is by sending the email to the appropriate recipients. In this case, the student should not send an email to the entire staff if only certain individuals can answer the question. Sending the email to a targeted group of people who can provide the necessary information or assistance is more effective and respectful of others' time.