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TextA--4.WhydidtheFederalAviationAuthorityrequiretheblackboxesbepaintedorangeoryellow?
题型：单选题
选项
A.
To distinguish them from the colour of the plane.
B.
To caution people to handle them with care.
C.
To make them easily identifiable.
D.
To conform to international standards.
正确答案：C