Final answer:
The correct answer is 1/2 cup. The requirement ensures that students receive a sufficient amount of vegetables in their meals.
Step-by-step explanation:
The correct answer is C. 1/2 cup. Since July 2012, children in grades K through 5 must be served a minimum of 1/2 cup vegetables with each National School Lunch Program reimbursable lunch. This requirement ensures that students receive a sufficient amount of vegetables in their meals to support their health and nutrition.