14. The commission has directed advertisers to restrict the use of the "word" to foods that do not contain color or flavor additives, chemical preservatives, or nothing that has been sythesized. A) or nothing that has been B) or that has been C) and nothing that is D)or anything that has been E)and anything official guide 的答案是D。 虽然是平行结构，但是我想问一下，它的平行部分是 noun or noun, noun, or noun. 这种结构比较少见，正常是 1)noun, noun, noun, or noun 2)noun , or noun , or noun, or noun. 请nn 讲讲 | 
