(D) Very few patients have allergic migraine reactions as children live migraine-free adult lives once they have eliminated from their diets foods to which they have been demonstrated to be allergic.答案解释说重述了一遍eliminating certain food does not solve the problem,怎么没看出是reiterate 啊。
I think it in this way: When people changed their diets from clean food to allergic food(which assumbly causes migraine), they were still healthy. So, food is not the reason to cause migraine.