单选题

Any troop of wild animals should be approached warily.
A. fearlessly B. confidently C. silently D. prudently

【正确答案】 D

【答案解析】warily小心警惕地；prudently谨慎地，慎重地；fearlessly勇敢地；confidently信赖地，安心地；silently默默地，静静地。