Two Buildings Are Connected with 802

Multiple Choice

Two buildings are connected with 802.11a wireless bridges using omnidirectional antennas. However, the connection between the two bridges often drops. Which of the following would be the BEST solution?

A) Change the antennas to unidirectional.
B) Conduct a site survey to identify sources of noise.
C) Add a second wireless bridge at each building.
D) Change the bridges to use 802.11g.