What he said at the meeting means those who had cut down the forests. A. to argue against

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A. to argue against
B. to argue for
(答案→)C. arguing for
D. arguing against
解析：动词用法辨析。Mean doing sth意味着做某事；mean to do sth想要做某事； argue for 为了…争论；argue against反对…而争论。句意：刚才在会议他说的话是在为那些砍伐森林的人在说话。根据句意说明C正确。