Netiquette refers to the proper or appropriate way of using the internet.
It means that users should respect the rights of others on discussion boards and extend common courtesy.
Based on the given excerpt above, from Philip K. story “The Gun”, the statement that tells us about the people who lived on the planet is that, t<span>he people were unfriendly and suspected anything that entered their territory to be an enemy. The excerpt wants to convey that there are some groups or race that consider anyone not part of them as a threat, and without a doubt, they would start a war against them. Hope this answer helps.</span>
I think it is sentence D. Hope this helped<span />