单项选择题

People's facial expressions may be misunderstood because______.
A.people of different ages may have different understanding
B.people have different cultures
C.people of different sex may understand a gesture in a different way
D.people of different countries speak different languages

A.A.people
B.people
C.people
D.people

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People's facial expressions may be misunderstood because______.A.people of different ages may have different understandingB.people have different culturesC.people of different sex may understand a gesture in a different wayD.people of different countries speak different languages

People's facial expressions may be misunderstood because______.
A.people of different ages may have different understanding
B.people have different cultures
C.people of different sex may understand a gesture in a different way
D.people of different countries speak different languages