The description of the data center cooling system, which of the following is incorrect?

The description of the data center cooling system, which of the following is incorrect?
A . Cabinet-level air conditioning for cooling inside the cabinet.
B . In cabinet-level, row-level, and room-level cooling, the row-level cooling mode has the shortest airflow path.
C . Room-level cooling can improve the cooling efficiency by changing the air-out position.
D . In low power density data centers, room-level cooling has cost advantages.

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Answer: B