What is the effect of introducing the sampler feature into the Flexible NetFlow configuration on the router?

Refer to the exhibit.

What is the effect of introducing the sampler feature into the Flexible NetFlow configuration on the router?
A . NetFlow updates to the collector are sent 50% less frequently.
B . Every second IPv4 packet is forwarded to the collector for inspection.
C . CPU and memory utilization are reduced when compared with what is required for full NetFlow.
D . The resolution of sampling data increases, but it requires more performance from the router.

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Answer: A