Refer to the exhibit. A client must provide wireless coverage for a square courtyard. Each side of the courtyard measures 350 feet (106 meters). The height of the walls is 25 feet (7.6 meters). The only available mounting point for the antenna is in the center of one of the courtyard walls, which is about 12 feet (3.5 meters) from the ground. What is the best antenna to use for maximum courtyard coverage?
A.
2.2 dBi omni
B.
6 dBi patch
C.
13.5 dBi Yagi
D.
21 dBi dish