Final answer:
One sentence is correct and free from fragments: 'Poe also established the following conventions: the locked room mystery, the accusations of an innocent suspect, and the trap set for the real perpetrator.'
Explanation:
The sentence that does not contain a sentence fragment and is punctuated correctly is:
- Poe also established the following conventions: the locked room mystery, the accusations of an innocent suspect, and the trap set for the real perpetrator.
This sentence contains a subject (Poe), a verb (established), and communicates a complete thought. It is punctuated correctly with a colon to introduce the list of conventions established by Poe.
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