Which access categories are defined in the Wi-Fi Alliance Wireless Multimedia certification?
A. Voice, Video, Best Effort, Background
B. 802.11b, 802.11g, 802.11a, 802.11n
C. 802.11k, 802.11r, 802.11w, 802.11ac
D. Expedite Forwarding, Assured Forwarding, Data, Scavenger Traffic
