Past assessments of the Brazilian rain forest have used satellite images to tally deforested areas, where farmers and ranchers have clear-cut and burned all the trees, but such work has not addressed either logging, which is the removal of only selected trees, as well as surface fires, burning down individual trees but do not denude the forest.

1. which is the removal of only selected trees, as well as surface fires, burning
2. which removes only selected trees, or surface fires that burn
3. which removes only selected trees, along with surface fires that burn
4. removing only selected trees, or surface fires, burning
5. removing only selected trees, as well as surface fires that burn

B感觉没有D的结构来的对称...不懂..NN指点

明白了...就是but前后的对称....

但仍然感觉B的两部分的从局不对称..一个是WHICH..一个是THAT