What are the three conditions that must be met to consider a link between a parent and child to be optimal? (Choose three.)
A. The link to the parent must offer at least 10-dBm SNR.
B. Both APs have the same BGN.
C. The channel to the potential preferred parent can have no interference.
D. The link to the parent must offer at least 20-dBm SNR.
E. The channel to the potential preferred parent is not silent or blacklisted.
F. Both APs must use the default BGN.
