A manager tells the network engineer to permit only certain VLANs across a specific trunk interface. Which option can be configured to accomplish this?

A.
allowed VLAN list

B.
VTP pruning

C.
VACL

D.
L2P tunneling

Explanation:
When a trunk link is established, all of the configured VLANs are allowed to send and receive traffic across the link. VLANs 1 through 1005 are allowed on each
trunk by default. However, VLAN traffic can be removed from the allowed list. This keeps traffic from the VLANs from passing over the trunk link.
Note: The allowed VLAN list on both the ends of the trunk link should be the same. For Integrated Cisco IOS Software based switches, perform these steps:
1. To restrict the traffic that a trInk carries, issue the switchport trunk vlan-Iist interface configuration command.
This removes specific VLANs from the allowed list.
https://supportforums.cisco.com/document/11836/how-define-vlans-allowed-trunk-link