A North American customer is using 2.4-GHz radios in a point-to-point configuration. The radio power level is 17 dBm and is transmitting at 11 Mbps. The customer is using 21.5-dBi dish antennas and 50 feet of cabling, with a loss of 8.4 dB per 100 feet. The customer increased the distance between the transmitter stations and began experiencing link problems.

Without using a professional installer, which step should the customer take to fix the situation?

A.
Use a cable with lower loss.

B.
Upgrade to an 802.11a radio.

C.
Install a higher gain antenna.

D.
Increase the transmitter power.