While Deploying IGP Non-Stop Forwarding (NSF), Which Practice Is the Best

Multiple Choice

While deploying IGP non-stop forwarding (NSF) , which practice is the best for tuning routing protocol hello and dead timers?

A) The hello and dead timers should be tuned to allow NSF to continue forwarding after an initial failure detection.
B) The routing protocol hello and dead timers should be decreased to the minimum.
C) NSF-independent timers should be used so that routing protocol timers have no effect.
D) The hello and dead timers should be tuned so the link failure is detected before NSF has the chance to react to the failure.