Which is the BEST thesis statement for an essay on research results about student satisfaction with school cafeteria food?

A) I recently found impressive and valid research that backs up my theory that middle school cafeteria food has gotten so much better over the past ten years.
B) Even though I hated school lunches, I am not surprised that elementary kids like the food served in cafeteria lunch rooms across America because the portions are huge.
C) Despite the student tradition of complaining about school lunches, three recent studies indicate that most students actually like cafeteria food, rating taste and portion size as above average to excellent.
D) While certainly there is much room for improvement, especially in seasoning, it is a fact that today's elementary, middle, and high school students eat healthier, better tasting food all day long, including cafeteria food.