In this country, the quality of food product is according to the highest international standard.
A. graded
B. confirmed
C. marked
D. ranged
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(答案→)A. graded
B. confirmed
C. marked
D. ranged
解析：句意“在这个国家，食品质量是根据国际最高标准来评级的。”grade“评分，把......分等级”；confirm“证实，确认”；mark“标志”；range“在......范围变动”。故选A。