Exam 300-425 topic 1 question 46 discussion

A - seems the best answer. "The intended use-case for RX-SOP is for high density deployments such as stadiums, large auditoriums, and other scenarios where many client devices are connected per AP. Additionally, this tool should only be used for fine-tuning after other Wi-Fi best practices have been followed. Finally, RX-SOP should only be used to tune out neighboring or adjacent cells of coverage. Never use RX-SOP in an attempt to tune out distant client devices, as this is not the intended use case for the feature and it can cause unintended connectivity problems."

A is correct and I think 802.11w is not correct and that might be a good choice when you want more safety and security for payment system, here in this question the issue is not security , https://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_0100.html#:~:text=The%20802.11w%20protocol%20applies,Management%20Frames%20(%20PMF)%20service.

Provided answer is correct

https://documentation.meraki.com/MR/Radio_Settings/Receive_Start_of_Packet_(RX-SOP)