Final answer:
Option A is punctuated incorrectly.
Step-by-step explanation:
The sentence that is punctuated incorrectly is Option A. In this sentence, there is a comma after the word 'pie' followed by the coordinating conjunction 'and'. However, a semicolon should be used instead of the comma. The correct punctuation would be: 'Theresa baked an apple pie; the pie was delicious.'
Learn more about punctuation in English sentences