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

Answer: B