What three pieces of information must be collected for an active survey to assess the outcome best suited for the facility?

An engineer is gathering information for a wireless survey of a hospital.

What three pieces of information must be collected for an active survey to assess the outcome best suited for the facility? (Choose three.)
A . presence of microwave ovens
B . number of patients that are at the facility
C . utilization of Location Services or voice applications
D . floor plans of adjacent facilities
E . use of wireless for secure records
F . spectrum analysis to locate all the computer work stations
G . existing Network Switch types and model numbers
H . type of devices present on the new wireless network

Answer: A, C, H