An Indoor Sports Stadium Has 5,000 Seats in Two Rings

An indoor sports stadium has 5,000 seats in two rings: The stadium has a ceiling height of 72 feet (22 m) . There is a catwalk around the perimeter of the stadium that is 54 feet (13 m) from the floor. There are two scoreboards at either and of the stadium. The construction of the stadium is concrete and steel. The customer has indicated a preference for overhead coverage, and the wireless network should support 3500 concurrent clients. The architect plans to install the APs on the catwalk to service sections of the floor below. Which type of antennas are recommended for the APs that provide the overhead coverage?

A) high gain directional
B) high gain omnidirectional
C) downtilt
D) Yagi