单项选择题

A. Dual power feeds will make the installation difficult to manage and less high available.
B. The single air conditioner is a single point of failure and the customer should be made aware of the issue.
C. The single air conditioner is a single point of failure and HACMP should be customized to compensate for the issue.
D. A single power feed should be used to avoid ground loops in the computer room causing premature failure of the systems.