【单项选择题】
You are trying to change the polling parameters used by the location manager via the cisco wcs， and your request is being denied.<br /> What is wrong？（）<p> You are trying to change the polling parameters used by the location manager via the cisco wcs， and your request is being denied.<br /> What is wrong？（）</p>
A、A.polling values can be changed only in the maintenance window.
B、B.polling values can be changed only on the location server.
C、C.your login does not have the correct permissions.
D、D.you must wait for the location server to become available.
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