Answer:
D). According to Farming Today magazine, "Shane Stewart, an lowa farmer,
raises the animals (Holstein cows with the sweetest personalities in the
entire Midwest."
Step-by-step explanation:
The last sentence is correctly punctuated as it employs the appropriate use of the comma(,), double quotation marks("..."), and full stop(.). The first option is inappropriate as it wrongly employs a full stop in the middle of the sentence and fails to close the quotation marks. While the second option is incorrect as it doesn't employ quotation marks to denote the quoted text and the third option is wrong due to incorrect use of the quotation marks. Thus, option D is the correct answer.