Which statement best represents the characteristics of a VLAN?

A.
Ports in a VLAN will not share broadcasts amongst physically separate switches.

B.
A VLAN can only connect across a LAN within the same building.

C.
A VLAN is a logical broadcast domain that can span multiple physical LAN segments.

D.
A VLAN provides individual port security.

Explanation:
http://www.cisco.com/en/US/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli_rel_4
_0_1a/VLANs.html
Configuring VLANs
You can use virtual LANs (VLANs) to divide the network into separate logical areas. VLANs can
also be considered as broadcast domains.
Any switch port can belong to a VLAN, and unicast, broadcast, and multicast packets are
forwarded and flooded only to end stations in that VLAN. Each VLAN is considered a logical
network, and packets destined for stations that do not belong to the VLAN must be forwarded
through a router.