Final answer:
The correct punctuation for sentence 9 is option D, where the song title 'Jingle Bells' is enclosed in quotation marks, while the rest of the sentence is not.
Step-by-step explanation:
The correct way to punctuate sentence 9 is option D. This option correctly places the title of the song in quotation marks, which is standard for titles of songs, poems, and short stories. Punctuation marks like commas and periods are placed outside the quotation marks unless they are part of the quoted material.
In this case, "Jingle Bells" is the title of the song that the family started singing, so it should be enclosed in quotation marks. The rest of the sentence describes what happened when the door cracked, so it should not be in quotation marks.
Therefore, the correct sentence is: As soon as the door cracked, the family started singing "Jingle Bells" at the top of their lungs.