WhenusingWMMCallAdmissionControl，whatarethedefaultbandwidthvaluesforvideoon802.11a／n（）？
A.MaxRFbandwidthis75percent，reservedroamingbandwidthis6percent.
B.MaxRFbandwidthis50percent，reservedroamingbandwidthis10percent.
C.MaxRFbandwidthis50percent，reservedroamingbandwidthis15percent.
D.MaxRFbandwidthis0percent，reservedroamingbandwidthis0.