such work has not addressed either logging or surface fires but do not denude the forest 看出来很明显的不合理吧
如果是B, such work has not addressed either logging or surface fires that burn down individual trees but do not denude the forest 则是一个合理的对称结构,再由逻辑意思来证明 野火会烧掉树但不会剥蚀树林