Final answer:
The correct sentence is: After walking home from school, Carl ate some cheese, crackers, and juice.
Step-by-step explanation:
The correct sentence is: After walking home from school, Carl ate some cheese, crackers, and juice. This sentence is punctuated correctly because it uses a comma to separate the introductory phrase 'After walking home from school' from the main clause 'Carl ate some cheese, crackers, and juice.' In contrast, the other options are punctuated incorrectly. The first option uses semicolons incorrectly instead of commas, and the second option uses colons and a comma inappropriately.
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