单选题 After the Vietnam War, the image of the United States, especially its armed forces, was ______.

【正确答案】 D

【答案解析】单词discredit：使丢脸；怀疑；不信。单词disfigure：毁损……外形／容貌；损害。单词disappoint：使失望。单词disfavor：不赞成；冷待；失宠；厌恶。