How does agentless monitoring differ from agent-based monitoring?

How does agentless monitoring differ from agent-based monitoring?
A . Agentless can access the data via API. while agent-base uses a less efficient method and accesses log data through WMI.
B. Agent-based monitoring is less intrusive in gathering log data, while agentless requires open ports to fetch the logs
C. Agent-based monitoring has a lower initial cost for deployment, while agentless monitoring requires resource-intensive deployment.
D. Agent-based has a possibility to locally filter and transmit only valuable data, while agentless has much higher network utilization

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Answer: B