In some parts of Asia, a person mustn’t sit with his feet another person, isconsidered i

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A. pointing at; it
B. pointed at; which
(答案→)C. pointing at; which
D. pointed at; that
解析：考查with的复合结构和定语从句。with his feet     ，是“with+宾语+宾补”结构，宾语his feet和宾补point at是主谓关系，所以要用doing形式。排除B,D;      is
considered impolite.是定语从句，先行词是前面整个句子，用which引导。选C。