Final answer:
The sentence with an incorrect preposition is "Consult a doctor if you suffer with bronchitis," where "with" should be replaced with "from." Apostrophe corrections for the given sentences include adding them for possession and contractions, and removing unnecessary ones. Therefore, the correct option is c) ""Consult a doctor if you suffer with bronchitis."
Step-by-step explanation:
The sentence that uses an incorrect preposition is: "Consult a doctor if you suffer with bronchitis." The correct preposition here would be from, as in "suffer from bronchitis."
Now, let's correct the sentences with reference to apostrophes:
- Jack's and Jill's hill is nothing more than a mound of dirt on the southwest corner of Farmer John's land.
- One's labor is proportional to one's wealth.
- George shouldn't say that he'll be in the library when he obviously won't.
- I'll be back.
- Who'll referee those kids' soccer game if not for your brother?
These corrections insert missing apostrophes where they indicate possession or contractions, and they omit unnecessary apostrophes.