Which approach achieves this goal and does not impact router CPU utilization?

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A company with multiple service providers wants to speed up BGP convergence time in the event a failure occurs with their primary link.

Which approach achieves this goal and does not impact router CPU utilization?
A . Utilize BFD and tune the multiplier to 50
B . Lower the BGP hello interval
C . Decrease the BGP keepalive timer
D . Utilize BFD and keep the default BGP timers

Answer: D