Final answer:
The question is about correcting a sentence in English.
Step-by-step explanation:
The subject of this question is English as it involves correcting a sentence and making it appropriate for standard written English.
The original sentence has a punctuation error and is worded awkwardly. The corrected option is:
He came up with his idea for a line of Southern-inspired cuisine in 1989.
This option eliminates the unnecessary period after '1989' and rephrases the sentence more clearly and concisely.
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