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.
B:which removes only selected trees, or surface fires that burn (answer)
D: removing only selected trees, or surface fires, burning 中间的逗号不好,分割开了burn的逻辑主语。