单项选择题

WhichofthefollowingNTPcommandspecifiesthatarouterisinth……

Which of the following NTP command specifies that a router is in the Eastern time zone， which isfive hours behind GMT？（）

A.timezone EST -5
B.clock timezone GMT -5
C.dock GMT -5
D.clock EST-5
E.NTP timezone EST -5
F.dock timezone EST -5

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