Calculation formula of signal field strength (without considering factors such as interference and line loss) is:

 Calculation formula of signal field strength (without considering factors such as interference and line loss) is:
A .  Final signal field strength = antenna gain – transmission distance attenuation value – obstacle signal attenuation
B .  Final signal field strength = AP transmit power + antenna gain – transmission distance attenuation value – obstacle signal attenuation
C .  Final signal field strength = AP transmit power – transmission distance attenuation value – obstacle signal attenuation
D .  Final signal field strength = AP transmit power + antenna gain + transmission distance attenuation value – obstacle signal attenuation

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Answer: B