Which of the following is MOST likely causing an intermittent flashing LED on an IR receiver when the remote control is not being used？（）

• A、The power supply is faulty and should be replaced.
• B、The heat from a heating， ventilation， and air conditioning （HVAC） register is being received as infrared noise.
• C、The radio frequency interference （RFI） is being received as noise.
• D、A plasma display is emitting infrared noise.