VLANs provide separation for which type of domains?

A.
collision domains

B.
multicast domains

C.
broadcast domains

D.
virtual domains

Explanation:
This standard defines transparent bridging (generally called simply bridging). Bridging divides a single physical LAN (a single broadcast domain) into two or more virtual LANs, or VLANs. Each VLAN is a collection of network nodes that are grouped together to form separate broadcast domains. On an Ethernet network that is a single LAN, all traffic is forwarded to all nodes on the LAN. On VLANs, frames whose origin and destination are in the same VLAN are forwarded only within the local VLAN. Frames that are not destined for the local VLAN are the only ones forwarded to other broadcast domains. VLANs thus limit the amount of traffic flowing across the entire LAN, reducing the possible number of collisions and packet retransmissions within a VLAN and on the LAN as a whole.