How can packet butter protection be configured?

How can packet butter protection be configured?
A . at me device level (globally to protect firewall resources and ingress zones, but not at the zone level
B . at the device level (globally) and it enabled globally, at the zone level
C . at the interlace level to protect firewall resources
D . at zone level to protect firewall resources and ingress zones but not at the device level

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Answer: D