问题详情

The reason why few airlines want to impose a total ban on their passengers using electronic devices is ______.
A．they don"t believe there is such a danger as radio interference
B．the harmful effect of electromagnetic interference is yet to be proved
C．they have other effective safety measures to fall back on
D．most passengers refuse to take a plane which bans the use of radio and cassette players请帮忙给出正确答案和分析，谢谢！