What does understanding the radiation patterns of different antennas types help you to determine when providing wireless coverage in an office building?

What does understanding the radiation patterns of different antennas types help you to determine when providing wireless coverage in an office building?

A.
the exact number of access points that are needed

B.
the type of antenna to cover a specific area

C.
the size of an area that will be covered

D.
the location of the access points