What is a best practice the administrator should implement to reduce CPU processing on the switches if a BFD neighbor fails?

An administrator is managing a pair of core AOS-CX switches configured for VSX. Connected to this core are pairs of aggregation layer AOS-CX switches configured for VSX. OSPF is running between the aggregation and core layers. To speed up OSPF convergence, the administrator has configured BFD between the core and aggregation switches.

What is a best practice the administrator should implement to reduce CPU processing on the switches if a BFD neighbor fails?
A . Disable ICMP redirects
B . Implement graceful restart
C . Increase the BFD echo timers
D . Increase the VSX keepalive timer

Answer: A