Exam 300-101 topic 1 question 703 discussion

I think B is correct LAN switches use forwarding tables, such as Layer 2 and Content Addressable Memory (CAM) tables, to direct traffic to specific ports based on the virtual LAN (VLAN) number and the destination MAC address of the frame. In order to prevent unicast flooding, you should set your CAM aging timer to be greater than or equal to the ARP timeout value. The default value for the L3 switch ARP timeout is 4 hours, and the default time for the L2 switch timeout is 300 seconds (5 minutes). To prevent unicast flooding, the L2 switch CAM aging timeout should be set to a value greater than the ARP timeout of the L3 switch. https://www.cisco.com/c/dam/en/us/td/docs/video/headend/Digital/QAM_Series/4022934_A.pdf

the best-practice recommendation from Cisco is that you adjust the FHRP device’s ARP timer to be equal to or less than the Content Addressable Memory (CAM) aging time. Otherwise, the CAM table entry for the end station will time out before the ARP entry times out, meaning that the FHRP device knows (from its ARP cache) the MAC address corresponding to the destination IP address, and therefore does not need to ARP for the MAC address

More likely, A