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单选题
Which of the following commands should be used to open a tty port configured in the /etc/uucp/Devices file as： Direct tty2 - 9600 direct in debug mode， ignoring modem control signal data carrier detect （DCD）？（）
A
cu -l tty2
B
cu -dml tty2
C
cu -dht Direct
D
cu -s9600 -l tty2
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