which settings should be set on a Cisco ip phone that is placed in a public Space like a lobby?

At the very minimum which settings should be set on a Cisco ip phone that is placed in a public Space like a lobby? (Choose two)

A.
Enable GARP

B.
Disable Settings button on the IP phone

C.
Disable PC Port access

D.
disable PC voice VLAN access

E.
Disable Web access on the IP phone