Which two actions ensure voice quality in a branch location with a low-speed, high-latency WAN connection? (Choose two.)

Which two actions ensure voice quality in a branch location with a low-speed, high-latency WAN connection? (Choose two.)
A . Increase WAN bandwidth
B. Increase memory branch switch.
C. Fragment data packets.
D. Replace any electrical links with optical links
E. Prioritize voice packets

Answer: C,E