The correct answer is A.
OBJ-2.3: The 5.0 GHz frequency has more individual channels giving it less congestion and interference than the 2.4 GHz frequency. The 5.0 GHz frequency supports higher data rates than the 2.4 GHz frequency due to lower levels of congestion and interference. The longer wavelength of 2.4 GHz makes it better at propagating through solid surfaces than the 5.0 GHz frequency. The 2.4 GHz frequency has a longer wavelength than the 5.0 GHz frequency. This longer wavelength gives the 2.4 GHz frequency the ability to cover a longer range using the same power output levels.