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单选题
Open communication should exist with the operator telling the manufacturer as soon as some new kind of situation arises and the manufacturer responding back with solid help to the operators.
A
The operator should have open communication, in case of any new situation arises, the manufacturer should be informed timely and give effective help to the operator.
B
Open communication should exist with the operator and the manufacturer respectively, so the operator can know the new situation and the manufacturer can provide reliable help.
C
There should be an open communication between the operator and the manufacturer so that the latter can provide useful help once being timely informed of newly arising situation.
答案解析
正确答案：A
