Answer:
D. polite behavior
Step-by-step explanation:
When we refer to the word “etiquette” we are talking about our behavior, especially in a formal setting.
For example, good table etiquette is when you wipe your mouth when it is dirty and say ‘please’ and ‘thank you’. Good etiquette is all about minding your manners and being polite.
Therefore, the correct answer is D. polite behavior.
Hope this helps! Have a blessed day! :)