Final answer:
The best argument Jill can make to persuade a judge if this goes to court is that the curtains were custom-made for the odd-shaped window.
Step-by-step explanation:
The best argument Jill can make to persuade a judge if this goes to court is option C) The curtains were custom-made for the odd-shaped window. Jill can argue that the curtains were specially designed to fit the unique dimensions of the window, indicating that they were intended to be a permanent fixture in the house. This would suggest that the curtains should be considered part of the house and included in the sale, even though they were not specifically listed in the agreement for sale.