What item is essential for performing a manual RF site survey for a warehouse facility?

A.
A facility map with an explanation of applications used in each area

B.
I-Beam mounting kits for hanging temporary access points

C.
High-gain omni antennas for APs mounted high on warehouse ceilings

D.
Predictive site survey software that supports directional antennas

E.
NEMA enclosures that protect APs used for the survey