Final answer:
Students have one opportunity to change their meal plan during a specific time near the end of the quarter, with the new plan becoming effective at the start of the next quarter.
Step-by-step explanation:
There is one opportunity to change your meal plan, during the meal plan change window that takes place near the end of the quarter. The new meal plan takes effect at the beginning of the quarter. Therefore, the correct answer is A. one opportunity, the, the.