Which of the following sentences is correct? A. The new perfume really smells badly. B. That shade of lavender looks badly on me. C. Even his mother admitted he danced bad. D. She feels so bad about missing the meeting.

The correct answer is D. She feels so bad about missing the meeting. All other sentences use adverbs and adjectives incorrectly. First one has badly instead of bad, the second uses badly, while the third one should actually have badly instead of bad. The fourth one is grammatically correct.