Hi Amused Medusa. Which comma did your instructor think should be a semicolon?
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Mister MicawberWell, if Medusa wasn't amused before, s/he is now.I agree with you there!!
I'm not really sure why it is optional though. Do you know why?
Use commas to separate three or more items in a series.
St. John Chrysostom was born in Antioch, lived in Cantantinople, and died in Armenia.
Although some writers omit the comma before the conjunction and final item in a series, it is safest to use a comma here because its omission often leads to a