A customer wants to have wireless network access only in the conference room. The customer has placed a WAP in the room, but notices that offices across the hall also receive a wireless signal. Which of the following could be done together to solve this problem? (Select TWO).

A.
Turn down the signal gain.

B.
Increase the encryption method.

C.
Change the wireless channel.

D.
Replace the WAPs antennas with directional antennas.

E.
Disable the SSID.