When using third-party antennas that provide a gain greater than +6 dBi for Context-Aware software, the difference in gain between the third-party antenna and the Cisco equivalent should not exceed which gain level, assuming a fixed power level? Select the best response.

A.
1dBi

B.
3dBi

C.
6dBi

D.
9dBi

E.
No third-party antennas are supported.