Where can the administrator configure a DSCP value to meet this goal?

A company has a Unified Communications and Collaboration (UCC) solution.

– Users run softphones on their desktops and laptops.

– The UCC solution is configured to use a certain range of Layer 4 ports for VoIP traffic.

– The user devices connect to AOS-Switches.

A network administrator needs to configure the AOS-Switches to prioritize only the VoIP traffic.

Where can the administrator configure a DSCP value to meet this goal?
A . in a global UDP port-based QoS policy
B . on the interfaces through which the VoIP traffic is forwarded
C . on the interfaces that connect to the user devices
D . on the VLAN to which the user devices are assigned