【单选题】
A Client.connect(hostname=‘192.168.1.1’,username=‘huawei’,key_filename=‘id_rsa’)
B Client.connect(username=‘huawei’,key_filename=‘id_rsa’)
C Client.connect(hostname=‘102.168.1.1’,username=‘huawei’,pkey=‘id_rsa’)
D Client.connect(username=‘huawei’,pkey-key)
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