Which sentence best supports the idea that good conversationalists need to acquire good judgment?

Question

adapted from "Conversation" in Etiquette
by Emily Post

Need of Reciprocity

Ideal conversation should be a matter of equal give and take, but too often it is all "take." The voluble talker—or chatterer—rides his own hobby straight through the hours without giving anyone else, who might also like to say something, a chance to do other than exhaustedly await the turn that never comes. Once in a while—a very long while—one meets a brilliant person whose talk is a delight; or still more rarely a wit who manipulates every ordinary topic with the agility of a sleight-of-hand performer, to the ever increasing rapture of his listeners.
But as a rule the man who has been led to believe that he is a brilliant and interesting talker has been led to make himself a rapacious pest. No conversation is possible between others whose ears are within reach of his ponderous voice; anecdotes, long-winded stories, dramatic and pathetic, stock his repertoire; but worst of all are his humorous yarns at which he laughs uproariously though everyone else grows solemn and more solemn.
There is a simple rule, by which if one is a voluble chatterer (to be a good talker necessitates a good mind) one can at least refrain from being a pest or a bore. And the rule is merely, to stop and think.

"Think Before You Speak"

Nearly all the faults or mistakes in conversation are caused by not thinking. For instance, a first rule for behavior in society is: "Try to do and say those things only which will be agreeable to others." Yet how many people, who really know better, people who are perfectly capable of intelligent understanding if they didn't let their brains remain asleep or locked tight, go night after night to dinner parties, day after day to other social gatherings, and absent-mindedly prate about this or that without ever taking the trouble to think what they are saying and to whom they are saying it! . . .
People who talk too easily are apt to talk too much, and at times imprudently, and those with vivid imagination are often unreliable in their statements. On the other hand, the "man of silence" who never speaks except when he has something "worthwhile" to say, is apt to wear well among his intimates, but is not likely to add much to the gaiety of a party.
Try not to repeat yourself; either by telling the same story again and again or by going back over details of your narrative that seemed especially to interest or amuse your hearer. Many things are of interest when briefly told and for the first time; nothing interests when too long dwelt upon; little interests that is told a second time. . . .
Be careful not to let amiable discussion turn into contradiction and argument. The tactful person keeps his prejudices to himself and even when involved in a discussion says quietly "No. I don't think I agree with you" or "It seems to me thus and so." One who is well-bred never says "You are wrong!" or "Nothing of the kind!" If he finds another's opinion utterly opposed to his own, he switches to another subject for a pleasanter channel of conversation.

Answer 1

The sentence that best supports the idea that good conversationalists need to acquire good judgment is:

"Nearly all the faults or mistakes in conversation are caused by not thinking."

This sentence highlights the importance of thoughtful consideration in conversation, suggesting that good judgment is essential to avoid mistakes and engage effectively with others.