The correct answer is D.
OBJ-5.4: The mean time between failure (MTBF) is the measure of the anticipated rate of failure for a system or component. This is effectively a measurement of the component’s expected lifespan. If the HVAC capacity is increased, the server room can maintain a cooler temperature range. Datacenters produce a lot of heat from the equipment being operated. Excessive heat can damage components and cause premature hardware failure. Therefore, increasing the HVAC capacity and airflow can lead to longer lifespans for servers and networking equipment.