Final answer:
The correct sentence that uses punctuation is option OC: Staring at the list of ingredients Molly exclaimed, "I forgot to buy a dozen eggs and flour."
Step-by-step explanation:
The correct sentence that uses punctuation is option OC: Staring at the list of ingredients Molly exclaimed, "I forgot to buy a dozen eggs and flour." The sentence uses quotation marks correctly to indicate direct speech, and it also uses a comma to set off the introductory phrase before the direct speech.
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