Final answer:
The punctuation error is at position 1, where a comma is incorrectly used to separate two independent clauses. It should be replaced with a period or a semicolon.
Step-by-step explanation:
The punctuation error in the sentence is after "oven," where a comma is used incorrectly. The correct punctuation after "oven" should be a period or a semicolon to separate the two independent clauses in the sentence. The corrected sentence should read either "The potatoes are in the oven. Kim, if you put the steaks on." or "The potatoes are in the oven; Kim, if you put the steaks on." Thus, the error corresponds to choice A.