Final answer:
The correct punctuation to fill in the blank is with a comma before the additional information 'a college professor and writer'.
Step-by-step explanation:
The correct punctuation to fill in the blank and punctuate the sentence correctly is option b. , which is ', a college professor and writer'. This is the correct option because a comma is needed before the additional information ('a college professor and writer') that is being added to the sentence.
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