A technician is installing a variety of servers in a rack. Which of the following is the BEST course of action for the technician to take while loading the rack...

A technician is installing a variety of servers in a rack. Which of the following is the BEST course of action for the technician to take while loading the rack?

A. Alternate the direction of the airflow B. Install the heaviest server at the bottom of the rack C. Place a UPS at the top of the rack D. Leave 1U of space between each server