Answer: I'm 50-50 between B & D. Because They both could be used as good or bad so It seems neutral, But the word carefree sounds more negative then untroubled.
The words<em> "carefree" and "untroubled" </em>are related in their denotation and the choice which explains their connotation is:
D.One has a positive and the other a negative connotation.
<h3>What is a Connotation?</h3>
This refers to the implied meaning of a word as it is used in a sentence based on the given context.
On the other hand, denotation refers to the original meaning of a word and we can see that the words <em>"carefree" and "untroubled" </em>are related in their original meaning but in connotation, one has a positive and the other a negative connotation.
