Respuesta :
The sentence where the commas are used correctly in is Sentence D :)
Answer:
D) In my opinion the meeting, unlike the lecture, was a waste of time.
Explanation:
To properly punctuate commas you have to remember that when putting commas into a sentence the content of the sentece should be understandable without the content of the commas, so the only one that adds information in the commas and is understandable without the commas is option D.