What is a direct impact of adding VLANs?

A. An increase of broadcast domains while decreasing collision domains
B. An increase of broadcast domains while increasing collision domains
C. A decrease of broadcast domains while decreasing collision domains
D. A decrease of broadcast domains while increasing collisions domains

B. When adding VLANs, you immediately increase the number of broadcast domains. At the same time you increase collision domains. If a switch had 12 ports and they all negotiated at 100 Mb/s half-duplex (one collision domain), when a VLAN is added you will automatically create two collision domains while adding an additional broadcast domain. An example of this would be when adding a VOIP VLAN to the interfaces.