CompTIA A+ Core 1 (220-1001) (#31)

A technician is determining the specifications for a desktop computer that will be used at trade shows all over the world. The computer will have the maximum amount of RAM. The CPU, GPU, and storage will be typical of a business workstation. Which of the following system parameters is the MOST important for the technician to consider when choosing a power supply?

input voltage
Efficiency rating
12V rail amperage
Number of SATA connectors