Which of the following can occur if the maximum rated load is exceeded on an uninterruptible power supply （UPS）？（）

• A、 There is a fire hazard potential if a power outage occurs.
• B、 The last system plugged into the UPS will not be provided any power.
• C、 The UPS will draw more power from the circuit to compensate.
• D、 The runtime of the UPS will be insufficient if a power outage occurs.