What is this 802.11 management frame also known as?

802.11k and 802.11k-enabled client devices send a request for a list of neighbor Aps (a neighbor list) from the APs they are currently associated with.

What is this 802.11 management frame also known as?
A . Association packet
B . Beacon frame
C . Action frame
D . Reassociation response.

Answer: C

Explanation:

From: 802.11r, 802.11k, and 802.11w Deployment Guide, Cisco IOS-XE Release 3.3 -802.11k Assisted Roaming [Cisco Wireless LAN Controller Software] -Cisco

http://www.cisco.com/c/en/us/td/docs/wireless/controller/technotes/5700/software/release/ ios_xe_33/11rkw_DeploymentGuide/b_802point11rkw_deployment_guide_cisco_ios_xe_release33/ b_802point11rkw_deployment_guide_cisco_ios_xe_release33_chapter_010.html

To facilitate roaming, an 11k capable client associated with an AP sends a request for a list of neighbor APs. The request is in the form of an 802.11 management frame known as an action packet.