Final answer:
The sentence needing a comma for correctness is Sentence 3(option c), which requires a comma after 'Mississippi' to separate the elements of the address.
Step-by-step explanation:
The sentence that needs a comma to be correct is Sentence 3: She was born in Greenwood Springs, Mississippi on May 2, 1992. To be grammatically correct, a comma needs to be added after the state to separate the elements of the address. The corrected sentence should read: She was born in Greenwood Springs, Mississippi, on May 2, 1992.
Choices A, B, and D do not require additional commas based on the rules of comma usage described:
- Sentence 1 does not need a comma because the introductory phrase is not present.
- Sentence 2 does not contain an interrupter that would necessitate a comma.
- Sentence 4 does not have an appositive phrase that would require commas.
It's essential to use commas correctly to clarify meaning and avoid ambiguity in writing. The use of a comma to separate items in addresses, dates, and lists follows general academic conventions and helps readers understand the sentence's structure and information flow.