Which statement correctly describes the function of a private VLAN?

Which statement correctly describes the function of a private VLAN?

A.
A private VLAN partitions the Layer 2 broadcast domain of a VLAN into subdomains

B.
A private VLAN partitions the Layer 3 broadcast domain of a VLAN into subdomains

C.
A private VLAN enables the creation of multiple VLANs using one broadcast domain

D.
A private VLAN combines the Layer 2 broadcast domains of many VLANs into one major broadcast domain