Unified Communications network?

Which recommendation is the best practice for marking video and voice media in a cisco

Unified Communications network?

A. Voice Cos 6 (IP Precedence 4, PHB AF41, or DSCP 24)

Video Cos 5 (IP Precedence 4, PHB EF, or DSCP 34)

B. Voice Cos 5 (IP Precedence 5, PHB EF, or DSCP 46)

Video Cos 4 (IP Precedence 4, PHB AF41, or DSCP 34)

C. Voice Cos 5 (IP Precedence 2, PHB EF, or DSCP 48)

Video Cos 4 (IP Precedence 4, PHB AF41, or DSCP 46)

D. Voice Cos 5 (IP Precedence 6, PHB AF41, or DSCP 16)

Video Cos 4 (IP Precedence 5, PHB EF, or DSCP 32)

A. Option A

B. Option B

C. Option C

D. Option D