The correct answer is: [B]:
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"Three major cities -- Hartford, Bridgeport, and Stamford -- make up the crucial voting blocks of Connecticut."
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B. Run-on because theres no stopping point on it. For example Flash flooding creates dangerous conditions, rain falls too quickly to be obsorbed into the ground or to drain.
Answer:
It seems like a complex sentence, just don't forget to add a comma after "phone".
Explanation:
Be bold and trust your abilities.
It would probably be C but not sure